Agreed.In the early weeks of the lock-down a similar idea about so-called herd immunity was heard from some of our UK's scientists until it became obvious that approach was a non-flyer and highly dangerous.
Governments have their own scientific advisers and their own ideas about how to proceed; it is highly unlikely a single approach will prove right for every country or nation. Various policies will be, and already have been, adopted and it's totally inevitable that they won't all be right.
Mistakes will be made because humans are fallible but worse than that mistakes will be made because some leaders are flawed and pig-headed - despite most of them being well-informed. We can only hope they're not allowed to have their own way all the time.