Like others have said - many people at the top are so successful because they ended up at the right place and right time, and their approach just fit exactly the problem at hand. They did not see the future, they just had a hunch - and that can go either way.
Put them anywhere else and it will be a disaster.
A good case study of this is Ron Johnson, who did miracles at Apple and then ran J.C. Penny into the ground.
If you look at the causes, it was blatantly obvious what he was doing wrong (doing away with sale prices). It's a kind of fundamental thing that one could understand by just asking some questions. Maybe it's not genius, maybe people "just do things" and they just happen to work once.
Most success stories are accidental, and one's ability to succeed really depends on how many times they are allowed to fail first.
Most of us here - we have no such luxury. We fail, we become homeless.
There are exceptions, of course, and there are truly talented managers out there. If I look around, however, all I see is clown cars accidentally driving into gold mines.