Many people don't own cars in NYC, so without the subway they couldn't get to work.
The schools being open late was about making sure that kids had access to food. It was likely a mistake to keep them open that long, and there was probably ways to make sure kids had access to food and didn't have to come to school, but that was the hesitation.
Separately since hospitals are largely under control at the moment, there should be some opening up of non essential procedures and messaging telling people that it's safe to go to the hospital. A lot of people aren't seeking treatment for things unrelated to COVID.