If getting sick is that high of a risk, do you really think relying on everyone in public to do something is worth the risk? If it only takes one person not doing something to put yourself at risk, you will be at risk, because you just can't trust everyone in public to do it.
Yeah, I'm not writing a mask for the rest of my life, sorry. Nobody else is wearing one, everyone is agreeing to be out in public without a mask, that's just how life is now.
If everyone around me is not wearing masks, the chances that me specifically will be the cause of someone getting so sick they have disabilities is extremely low. If everyone not wearing a mask would infect dozens or hundreds as you claim, we are already screwed.