The right way to think about it is to realize that hiring is a very difficult business, and we all make mistakes. So it's not who they hire, but who they intend

The right way to think about it is to realize that hiring is a very difficult business, and we all make mistakes. So it's not who they hire, but who they intend to hire. They still miss. So A players end up hiring B players when they don't want to, and sometimes A players sneak through the B player's filter. And this is why, when people that are apparently very good leave your company, you have to wonder if you have to much B team, and you are letting them run amok.