Ethelfromnumber73 - if you have the time, it is worth watching - although we had to pause it to try and get our heads around some of the science behind it - but it is a bit of a mission.
The genie is already out of the bottle, as the world went down the lockdown and the vaccine route (particularly the UK having being so "successful" with it). He is a vaccine development expert, with some 30 odd years experience, so he's not anti-vaxer.
He believes that we're going to have a 3rd wave (very soon, next couple of months) precisely BECAUSE of lockdowns (which has stopped our bodies being 'exercised' by the usual bombardment of germs, bacteria etc, so our immunities aren't as good as they were) and vaccines (which he says do work - on a personal individual level, but are not good for populations collectively).
He basically says we should have let the virus run its natural course, but of course, there would have been massive death numbers - however, at the end of it we would have had ourselves developed the immunity with our NK-Cells and T-Cells working for us.
I wish I was personally clever enough to really know what is the best course of action is/was. As others had said, scientists will disagree. I'm not advocating for him, but do think its important that we get to hear those other voices. As someone who's about to go into the next age bracket for the vaccine roll-out, its definitely concerned me.