Is it true; most failures of PMP are the experts?

Yes,

   This is true that most of expert fail due over confidence, rudy bihavior and ego issues.

   While nobish goes every corner of project like, project details, division of project into task, Building a good team based on Project and Task, Well Planning, Risk Assessment

It is always true. The failure is for the people who try. Most of the people who try are experts.

The experts also fail due to their own thinking, which is required to be unlearned to align with the team

Complacancy due to over confidence is also one of the reason.

Thanks for the invite !!! Below is my analysis:

The PMP is being “sold” as a project manager certification, which is obviously not the case. The PMP stands for Project Management Professional and not Project Manager Professional. There is nothing in the requirements that say the applicant must be a project manager … only that they led project management tasks. Yet some advertise it as “Led and directed projects successfully“. There is a huge difference between leading project tasks, leading projects, and successful performance.

One more issue is how PMP is administered by PMI.

PMI claims that the PMP is “demonstrated competence” how do they measure competence?

The PMI staff reviewing PMP applications do not have any evidence whatsoever that the candidate has actually managed a project before so how can they certify “demonstrate competence” and “successfully”?  All they know what a person tell them … and assuming the person did not lie – what  the person is telling them is:

That he/she has 35 hours of project management training; a friend could have trained them – so there is evidence of qualified training

That he/she has 4500 hours of experience in leading projects … again – assuming the person did not lie all we know that this person clocked 4500 hours on project related activities … and the projects could have been failure (report on success rates on technology projects shows only about 30% of project are successful).

To make the above situation worse, it is unfortunate that many candidates are not working as project managers or leading projects, they are working in technical roles, and some are not even technical leads. When we raise concern with PMI we do not get anywhere due to “privacy” concerns. So unless, we can PROVE something, the code of ethics and “professional and social responsibility” is down the drain.

I have no idea about this fact

Passing the exam of PMP is all that it required is lot of preparation and practice; without that definitely passing the PMP exam is impossible.  Its often notice that experts like senior Project Managers gets fail, the main cause is that lack of preparation and overconfidence on their experience.  PMP exam completely based on PMBOK so any candidates who is appearing for the exam should go thorougly PMBOK 2-3 times; practice mock exams until he get confidence that he can pass.

May be...

since practical life not like acadimic one

thanks for invitation

I don't think so, expertise is the most important qualification for any position, however, is was never the unique success key !

No , it is not and it can not be true .