From conversations with various people (and not any kind of meaningful study), it seems to me that there is a qualitatively different experience of this situation for people that naturally
think about things all the time. For my wife, having to skip the occasional event that she'd like to go to isn't a big deal, but having to constantly think about how risky each behavior is and make a conscious decision weighing that risk against other factors (like social expectations and psychological needs) is _extremely_ effortful.
I view "vaxxed and done" as a form of rounding, selected by people who find it psychologically untenable to handle a changed _risk profile_ by changing their behaviors in moderate ways. I'm boosted, as is everyone I'm in contact with - that has shifted my risk profile sufficiently that I felt comfortable eating at some restaurants (but not others) and at nearly any normal outdoor event, but not at a concert, a crowded bar, or a packed bus. But I have to keep an eye on infection rates, and change my behavior when they shift radically (as now), or when the risk profile updates for a new mutation.. And that's tractable for me - I think about everything I do, constantly, which I assume is much more true among the tech crowd than the population at large.
But most people _just don't do that_ kind of thing - being told to keep worrying about and considering a thing constantly sounds to many like "just keep stabbing yourself in the arm every day and eventually things will be fine". I don't know what there is to do about that, but I think it would be valuable for some folks in here to have a more realistic idea of the cost constant vigilance so often imposes.