One thing that I think is getting lost in all of these discussions is that it's okay for there to be a range of comfort levels. But a range implies there are boundaries, somewhere.
I got a booster shot of Moderna a little over a month ago, by lying to the clinic and telling them it was actually my first dose. (This is why I'm on a throwaway account, btw.) I'm aware this was kind of risky, because third doses haven't been well studied in my age cohort. And I also got really ill for a day!
I wouldn't recommend that anyone else jump ahead of the FDA guidelines like this—but it was something I wanted to do. I'm being very bad about masking and social distancing right now, and I'm in close contact with a lot of children, so I really wanted to do something extra to protect them.
At the other end of the spectrum, I think it's totally okay for anyone who is vaccine-skeptical, for whatever reason, to take a wait and see approach. But there eventually comes a point when a majority of the public has actually gone ahead and been guinea pigs for you, and you're just needlessly endangering people.