Sadly... hospitals ARE overflowing now in the US.
And herd immunity doesn't work, as the way Sweden is going shows. The sweds can't travel openly in Europe, because of the way they are going.
In Switzerland we didn't have a strict lockdown. But we managed to lower the infections that contact tracing is possible.
Europe is also widely testing, not only the risk groups.
Here in Switzerland the government showed real leadership, listened to science and showed empathy with the people.