If suddenly many of the people all around you had HIV (detectable levels of HIV, in the 80s or 90s, before effective treatments were available)… and you were watching them all have unprotected sex with lots of people, intentionally infecting other people — what would you think of them?
Why is Covid any different? People are infected. They know they are infected. And yet, they are making decisions to behave in ways that will definitely infect dozens or hundreds of other people.