That seems fair to me. 3 negative tests seems like a pretty solid sample size. Covid isn't a death sentence and people do heal.
From what I understand, given the increased testing (both direct and antibody tests), it appears that the death rate for covid-19 is about 0.4% for the general population as a whole. The transmission seems to happen at the same rate regardless of age, but something like 60% of all the world's covid-19 deaths are age 80 and up. So the death rate for healthy men in their 20s and 30s has to be half of a half of a percent or something crazy low like that.
Not saying it's not serious for these guys. It is. I'm just responding to your point that for these people, covid-19 isn't a death sentence. You're right. For healthy people in this age group, it barely registers on the scale in terms of death risk. Not to say it can't happen, and there are potential ongoing health issues if you get it, and frankly, even if you survive it, it sounds like something that can be miserable to deal with, but in terms of "death sentence"...for this demographic, it just isn't really a concern.