2 key points.
"What New York needs to do isn't what everywhere else needs to do" was literally a column by one of the Republicans in the New York Times in April/May about why it was ok to be re-opening Florida and Texas. The problem turned out to be - that was wrong. Everywhere needed to kill it, everywhere needed to get it under control, and when some places listened to that advice, they created another nationwide spike.
Second, on point 2, - That's exactly what Texas, Florida, Arizona did. Their death rates haven't hit New York levels yet, but these states are a disaster. Texas has had to shut down non-essential surgeries for the 2nd time already, which means hospitals are going bankrupt fighting this thing and people can't get needed medical care. Businesses are back to closing because people are coming into their offices sick and infecting other people even when they take precautions like masks. Restaurants and bars cannot be open, it spreads too easily and you can't wear a mask while eating or drinking. People can't work with this thing around. People get too sick and it spreads too easily, and yes it may not kill that many people below 50, but something like 5% still wind up hospitalized and there are an unknown number with large, long-term complications, including people who are never hospitalized. This thing is an absolute beast. You cannot send people out to get infected by this thing, the people who this didn't kill are still potentially going to be having major issues years down the road.
There will not be a US Economy until either:
1. We get case loads nationwide down so low that it is possible to test, trace, and isolate virtually every case, or:
2. We have a vaccine.
You can pretend things are open, but eventually your business community will revolt once their workers are all getting it, and half the population is going to check out anyways because we know our risk factors.