Actually, there are a lot of movie-making hubs popping up around the US. Lots of cities (mine included) are trying to grow a film industry with incentives.
(I think it's a poor policy decision, since it's just another beggar-thy-neighbor system, but that's a separate issue.) If you are trying to get into film you don't have to go to Hollywood these days. Hollywood is still the plurality of US film-making, but I don't think it's the majority any more.)
If you want to be cast, you want to be in LA or NYC. If you want to PA, it may be advantageous to be in the shooting city, but local PAs will still be lower on the totem than the PAs from the production company, until they prove themselves.
It's not really beggar-thy-neighbour if we just end up with more entertainment. If there were more good shows, I'd watch more tv. (not sure I want that outcome!)
(I think it's a poor policy decision, since it's just another beggar-thy-neighbor system, but that's a separate issue.) If you are trying to get into film you don't have to go to Hollywood these days. Hollywood is still the plurality of US film-making, but I don't think it's the majority any more.)