You are just proving my point, Jeremy, with that graph. Of course lockdowns work, albeit temporarily. That's why you need three of them (so far).
"Until vaccines" argument... it was "two weeks to flatten the curve" initially, now it is two years. And then variants occur. And vaccines needed every six months. And different vaccines for different mutations. And then, like the seasonal flu, some people will take it, others want. But the cost of the two years until vaccines is staggering, measured by many other parameters than just death from Covid: world hunger, premature child death, lack of education, depression, obesity, alcoholism, narcotics, denied medical services, and last, but not least, unemployment, ruined lives and careers, economic crash.
P.S. Forgot to add: the rise of fascism and communism.