I'm not fearful about getting long covid, because I've already had covid and am fine now. At the same time, as others have said, I wasn't naive about the possibility of viral infections leading to long-term effects.
I've had (horrifically painful) shingles twice in the last decade and have an irritating scar on my nose (bright white) from chickenpox as a child. So it would be better if I'd not had chickenpox, but I'm very glad that my parents didn't ban me from birthday parties, the playground slide etc, all to reduce the risk of 'long chickenpox'.
We are animals, we're born, eat, sleep, get viruses, bacterial infections, worms (current experience with toddler!), etc, and eventually we die. This seems, in 2020, to have come as a grim, shocking realisation to a lot of people.
In between, we can, if we choose, experience happiness, love, beauty, and try to find some sort of meaning in the pattern of the days. Obsessively worrying about getting a virus that is likely to be much like other viruses you've already had is a waste of time.
As for the vulnerable: it's not about casually inflicting suffering and death on them, it's about the fact that they're already suffering and, in many cases, living very diminished lives. Half of people in a care home die within 18 months of arriving. It's not a tragedy if someone in a care home dies of covid, other than in the (massive, unforgivable!) sense that we're born, have our run at things, and die. Or, to put it another way, there's a linguistic problem with using the phrase 'saving someone's life' (a phrase that suggests heroism, leaping into the river to rescue a struggling child, rushing into the burning building etc) if we mean 'prolonging by a few months, maybe a year or two, the life of someone with a terminal condition'. (Old age being the finally terminal condition.)
There are, of course, younger people with suppressed immune systems and other forms of vulnerability who benefit much more strongly from lockdown. But very few people run the risk of having their lives dramatically cut short by Covid. It's not heart disease. It's not breast cancer. (A potentially much larger number of people run the risk of having their lives dramatically shortened by covid if these, more lethal, conditions fail to be screened and treated.)