Obviously we can't change the past, but we came very very close to doing the next best thing: make it culturally unacceptable to smoke.
We lose out on all that all over again, except replace tobacco with candy vape juice. I guess again the genie's out of the bottle and it's too late for another few generations, but it's such a shame to me.
Addressing the point of parent's responsibility: there's no chance parenting beat an subculture of cool, let's not pretend that's possible.