Are you actually blind to the fact that preventing a problem prevents the problem? The million dead is if nothing is done. Thing is, something is being done - so the death count is reduced. If handled perfectly, and nobody died, youd bitch about it; I suspect you think Y2K was nothing too (because of tremendous effort expended to make it nothing).
Let's say I was able to go back in time to 1933 and I assassinated Adolph Hitler. My defense in court would be of course that I saved millions of lives and a World War. But instead, I would be considered a lunatic. I would be convicted as an assassin.
Instead of going down in history as a hero for preventing a world calamity, I'd go down in infamy as taking out a promising young leader who looked to be getting his nation on the right track.
I'm not a fan of this lockdown but I grant that things would be much worse for us if we did nothing and millions died. So my point is, now that we have gone down this particular road, we will never know for sure what the outcome would have been if we maintained business as usual.
You can't measure what is prevented.