I think the lockdowns suck for social and economic reasons but it's good for our immune systems, because yeah when things open back up other viruses and diseases will spread again, but us humans haven't evolved that much past being cavemen yet and we were never meant to have so many social connections in the first lace. We'd be with our tribe and that's it. All thru the history of life on earth viruses have been destroying life, this is why skin evolved, to keep them out, but they can get in thru things like the mouth and nose. The less viruses we catch the better. Sure there is herd immunity but that just means having a virus and not dying from it, it's still better to not catch any in the first place.