“If the population was not locked down, less virulent stains would have spread naturally thru the population achieving herd immunity. Instead, lockdowns have caused a natural selection of the more transmissible forms of Covid to survive.”
The following is a long and good read. It backs up what you posted:
How Iceland hammered COVID with science!
The tiny island nation brought huge scientific heft to its attempts to contain and study the coronavirus. Here’s what it learned.
https://www.nature.com/articles/d41586-020-03284-3
Thanks for the link.