You aren't paying attention. Those young people who are tired of the mitigation measures? They're already ignoring them.
I'm sure you've seen all the spring break pics of kids partying in huge groups without masks. Do you really think telling them they can do
what they're already doing if they get vaccinated will make a shred of difference? That's bizarrely naive.
There is
nothing stopping them from going back to "normal life" right now. They don't NEED to get the vaccine if they don't want it. Why would they? It's not like any kind of verification is being done. If anyone does challenge them for not wearing a mask, they can simply say, "Hey, I'm fully vaccinated!" Who can tell?
Oh, but that would be a lie. We all know young people would never do that...