It seems like you're describing the phenomenon where people get promoted up until the point where they don't do a good job anymore.

I never knew how people can not see that the position was not for them and still accept it, and even work the job for years.

I could take a job where I had the technical responsibility for what my team makes, but I don't ever want to be anybodys boss. All of that personal stuff on a day to day basis, negotiating pay, etc just isn't for me.