Sorry this is probably one of the most divorced thing you've said from the real world. Despite the mask mandates, Europe wasn't able to contain a winter wave let alone a resurgent wave now. Los Angeles despite having one since spring ended up as one of the worst places in the US. But the vaccine has caused a tremendous drop in Israel and the UK (though with the UK it's hard to divorce from lockdown protocols). The 2 numbers are close only in your theoretical fantasy world. One works, the other one doesn't, in controlling waves.
It's probably because your 70% exists in a world where people like Fauci can keep their masks on when the cameras aren't rolling, part of the population doesn't say no thanks, people like Biden wear proper fitting ones without them having to be touched and pulled up by dirty fingers constantly, people without medical training like kids suddenly learn to properly wear mask, people don't constantly wash cloth mask and dispose of surgical masks after a single use, gaiters and bandanas aren't allowed, people don't get encouraged to use them to engage in more risky behavior, people use them for limited amounts of time to reduce short term exposures, people replace them if they get wet and people can stand to use them even in the home.
Totally missed the point.