// in the case of smallpox and polio, "control" has taken decades, nay centuries to achieve. ... //
This is technically true but I feel it's somewhat misleading to start the clock before medical Science had advanced, at least as far as the "centuries" bit goes. We were lucky that cowpox existed in 1796, for example, as without that the control technique for smallpox amounted to "get it young and hope you don't die", but the decision to attempt to eradicate smallpox was only taken in 1959 and was, in essence, successful only 20 years later. That's still a fairly fast turnaround -- yes, it makes months look puny, but it also depends on where you start. Smallpox was endemic when we were trying to control it, and Covid-19 was not. Allowing an initially local disease to spread so widely is, by any reasonable measure, a failure. And if it's regarded as an inevitable consequence of modern life then perhaps it should serve as a good excuse to re-evaluate the way we conduct our lives. We could start, perhaps, by demanding proper hygiene and welfare standards in agriculture, along with a comprehensive international oversight to ensure that those standards are kept. And if that's regarded as impossible then so what? It's a worthwhile target, no?