I hope you are right, it just has not been my experience.
I certainly know some people who are holding off getting the vaccine for very legitimate reasons (nursing mother, recent cancer treatment/weakened immune system, etc.).
Unfortunately, I know way more people who are refusing to get the vaccine because they believe it has a microchip in it, it is Bill Gates' way to control population growth, it causes infertility, it has killed thousands of people, covid is fake anyway, etc. Most of those people are not wearing masks now anyway.
My guess (and it is only a guess) is that if masks become only a suggestion for unvaccinated people, you will see around 10% of the population wearing them, even if less than 50% of the population is vaccinated (or otherwise immune). I certainly hope I'm wrong though.