Why are some managers against involving social media marketing in their marketing strategy?

Social medias are new,and full of people with bad intentions and scamers.They are afraid about loosing their strategies by exposing them

Today, social media are even more considered by managers in their marketing strategies but communication is always the last investment done. The main reason is that the investment in social media is not always fruitful: Instagram helps to reach potential customers but it is not proven that it increases for sure the loyalty of the clients.

Social marketing works some of the time. However, traditional marketing works all of the time. Traditional markeitng is tried and proven. Social marketing is hit and miss and can waste valuable marketing time.

I don't believe there are any left....however, if there were, the answer would most likely be: Because they are old. I have read some of the answers bellow, but I simply cannot dissagree more.

Not enough resources to focus on them? Social media offers the most broad audience one can hope to reach and then target. Delegate additional resources and focus, don't miss out on your biggest pool.

Affraid of mistakes? We learn from our mistakes, if we don't make them we don't learn. And one of the best features of social media is that it's such a sharp tool. If you make a mistake in most other media formats, feedback you receive will be really slow, mostly nonexistant and probably final. Result of an unsucessfull campaign will be low sales, and by the time you see your fault, it will be too late to correct anything. Social media is brisk and will cut off any mistake fairly quickly, and you will have enough time to correct your mistake - either by addressing the issue better or completely stopping the campaign before it reaches the point of no return - budget spent, no sales.

Avoiding something because...because...because... is not marketing strategy. Answering the questions with right answers is. But have in mind, a smart strategists chooses the question he will be answering so that the answer emphasizes his point.

You don't advertize that you are clearing the stock because the product is bad or the stock is high, you advertize that you are giving this one off gift to the customers - "Everything MUST GO, it's BLACK FRIDAY" - your answer is not about the overstock or lousy product, your answer is that you advertize a special day and you are willing to do anything for your faithfull customers, and both answere might be true. Some truer than others, but all still true. 

We are showing (off), and we should do it so we reach the broadest possible audience, If we can at the same time target specific focus groups within that audience, that is the best marketing anyone can want. 

So, avoiding social media, at the moment the biggest available market and the sharpest possible tool, out of fear, incompetency, lack of resources (wow?!?) is a sign that this particular manager is not living in this era. He is ignoring the best tool he can hope to have. 

For me, looking at someone avoiding social media in 2017/2018 is probably the same as that someone looking at a person in 1980 and avoiding TV adds, or in 1950s avoiding radio adds, or probably a fish salesman in Middle Ages market not shouting "FREEESSHHH FIIIISSHHHH"....no excuse...if you are on the fish market, scream from the top of your lungs...."FREEESSHHH FIIIISSHHHH", if you live in the FB era, use it to sell your fish, or you are obsolete

Social media is just another shopwindow, if you dont put your SALE sign there, but you pay TV add, radio add, and in-store communication, chances are you will miss some turnover. Depending on the product you have and sales and marketing targets you have established, you might not feel it much. BUT...if you do, you will for sure find out a lot about your product and marketing strategy.

Smart manager will not avoid that opportunity. Scared, outdated one will shy from it....

Social media is a great good thing, there s absolutly no doubt about that, except when it backfires sometimes on your intentions,

How can that happen or occurs? why PM's sometimes avoids it?

1- when they do not have the appropriate managment for it, because they need larger presence online to keep accounts straight (when their focus is making fast numbers or achieving target)

2- PM's avoid social media sometimes  not to lose credibility and being afraid from confrontations & possible mistakes online

3- PM's avoid social media when they are not prepared for larger discussions online and dont want to get into particular product details (pricing & benchmark) or when promoting on someone else s back or someone elses product misery or bad situation

4- PM's avoid social media when they are not sure about product quality and all they want to do is clear inventory as silent as possible (in case of clearance)

5- PM's avoid social media when they want to avoid negative stories or negative remarks on the product

6- PM's sometimes prefer traditional media marketing such as radio campaigns or billboards when they want faster more efficient contacting with customers 

7- sometimes and in some cases PM's avoid social media to prevent others from hijacking your rising popularity to market their own things

thank you and hope it has been useful for you. 

Social Media Marketing could have a far-reaching effect to targetted customers, especially the youth, but could  be used to advance negative message cues in times of adversity. Competitor rivalry is a fertile ground for such strategies, when trying to outdo one another in a given market niche.

Social marketing works some of the time. However, traditional marketing works all of the time. Traditional markeitng is tried and proven. Social marketing is hit and miss and can waste valuable marketing time.