I mean, isn't this just math?
The virus got from Wuhan, through a lock down, to NY, CA, IL, FL, etc. You don't think this is going to get everywhere?
What percentage of the population would need to be exposed before we achieve herd immunization? 60% at least from what I understand. That would be more than 1 or 2 million at a less than 1% mortality rate.
The reason the UK changed course it because it was so clear their health care system would be overwhelmed with that approach. And when preventable deaths aren't prevented, the rate goes a lot higher than 1%.
So otherwise we are on a lock down/self isolation policy for the next 12-18 months. And Trump is thinking of telling people to end it come Easter.