Another important point is that currently, the risks of long COVID seem not at all well understood. "Unknown risk" is quite a different thing than "low risk" or "high risk". The lengths to which it makes sense for people to go to avoid it right now depend on those risks, so lying low seems quite sane to me.
A worse problem still is, I think, that "we're all going to get it" is a self-fulfilling prophecy: viruses have been unconquerable in the recent past, but this is 2021, we have incredible understanding of the mechanisms (no, not most of the details: they're not all worth knowing) that should give us incredible power over them at some point in the relatively near future (as in the next few decades). If the next few decades, why not the next few years? If we believe it's "inevitable", we'll make it so. (not to mention abandoning effective measures like masks)
Perhaps because "always worried me more than the risk of death"? If so: this is because the evidence always seems to have said that the risk of long COVID has been at least an order of magnitude higher than the risk of death. Also, if you have no dependents, death involves less suffering: in the unlikely event it happens, you're out of the picture already after a short period of misery. On the other hand, chronic illness can come with a lifetime of suffering.
I think people who haven't had a chronic condition (including doctors) tend to underestimate the impact they can have on your life. Long COVID symptoms may not be "severe" or "serious" in a medical coding dictionary, but those terms in a medical dictionary are quite distinct from their everyday meanings.
The best evidence we have seems to be that somewhere very roughly around 20% of people who get infected (vaccinated or not) get it -- more if you're older, less if you're younger. Experts don't seem to be willing to say much about what fraction of those people will have symptoms forever, or to what extent (very happy to hear otherwise if somebody knows better!).
While case numbers are high again (in the UK) and with the more infectious and virulent Delta variant having replaced others, it's not totally clear to me that the risks from long COVID are even all that much changed since before the vaccines.