The downside is it creates a conflict between the city and the rest. The city is like "we want transit, everyone else go away". The rest are like "we want to give you business but your policies drive us away", and "we want transit, but we are forced to get a car because transit is only in the center".
It's an unnecessary conflict - just add some transit that doesn't revolve around the city center. This reduces the number of people just passing through the center and creating unnecessary stress, and it make transit possible for more people.
Manhattan is like a black hole - it sucks in every single transit from as far away as Massachusetts. Try to travel by public transportation from virtually anywhere nearby without going through Manhattan. You can't and it's unnecessary traffic.
It's an unnecessary conflict - just add some transit that doesn't revolve around the city center. This reduces the number of people just passing through the center and creating unnecessary stress, and it make transit possible for more people.
Manhattan is like a black hole - it sucks in every single transit from as far away as Massachusetts. Try to travel by public transportation from virtually anywhere nearby without going through Manhattan. You can't and it's unnecessary traffic.