The number of concepts, assumptions and level of underlying bitterness here is hard to address.
First, all people need jobs or companies have no customers. They don’t have to be at the top. Remember, at the end of every professional sports season, there is only one #1 team and player.
I found that most people that I worked with really wanted to do a good job, even when I was Backup Assistant Manager at McDonalds in college. It’s a matter of how they are treated, trained and given the right assignments.
When training computer programmers, I assumed that they could do anything until proven wrong. Many did things they never dreamed they could do. One said, “I learned more from you in 2 months than in the prior year and a half, which included a 6-week programming boot camp.”
I had only two failures, one due to arrogance and one was in the wrong profession. Probably none will make the next earth-shattering breakthrough, but they will be at the next level.
Most of the time it comes down to attitude, being in the right job, then skills.