What is more important for cyber security professionals to focus on, threats or vulnerabilities?

We shoud focus on both. But should focus more on  vulnerabilities. Bacause thease are makeing theats.

Cybersecurity has become an essential part of any national security policy. It has become known that decision makers in the United States of America, the European Union, Russia, China, India and other countries have categorized cybersecurity / cybersecurity issues as a priority in their national defense policies. In addition, more than 130 countries around the world have announced the allocation of cyber warfare divisions and scenarios within national security teams. All these efforts are added to traditional security efforts to combat cybercrime, e-fraud and other aspects of cybersecurity.

They should focus more on threats cause vulnerabilities can be handle at the level of the network administrator. 

In my opinoin, it is important to focus on both. Vulnerability is finding loopholes in the system and threats makes us understant that how to deal with real time problem or attack in the sytem. So vulnerability is more important to find loopholes in the system and fix them to secure the network. 

am focusing on more in Threats, becuse threats only have assumption. in case vulnerabilty that we can easy findout using tools or checking the developement of the application etc..

Most threats are coming to the network form inside the organisation, it colud be unware usage of internet or using device which is not have proper updation.

From my experince most of incindents happens through email which is using naive users.

Focus must be on both because they affect our systems and they are both imminent.However,vulnerabilities should be prioritized because this where the ball is.Focusing on threats may at times take us on a wild goose chase and wastage of resourses and time.But,it imperative to give it some reasonable consideration without ignoring it in totallity. 

It is a truth that it is always better to try and eliminate vulnerabilities in any security system rather than merely focus on perceived threats. If you design your security correctly, any subsequent threats can then be assessed on their individual merits in a measured way.

As Cyber Security professional we should focus on both areas but if we choose one of them then vulnerabilities, we will receive the threats if the system is vulnerable.

cybercrime professional should focus more on the vulnerability of their systems and network to make it formidable for attacks

The question contains an 'or', not an 'and'.  I'll pick vulnerabilities, as by definition, they are the known areas of weakness in your system.  Address those weaknesses,  and then you can begin to address the threats.  Threats need a weakness to exploit in order to become a breach. 

Both are important. In fact, a comprehensive identification of threats should drive the definition of a company's cyber security vulnerabilities. So specialists should focus on vulnerabilities because if those are addressed, then the threats are automatically taken care of.