That's true, but the intrinsic bias of...well, pretty much everyone...is to overhire, so that's what you need to fight. I don't think I've met anyone who was suffering from under-hiring, unless it was a situation forced upon them by lack of resources.

People feel important and "arrived" when they lead a big organization, and also, it can feel like you're doing the right thing, because it alleviates some stress. Even if you're otherwise allergic to large teams, you're so busy as a founder that any help feels like good help.