Everyone is susceptible tbh. The only reason it was announced early on that younger people without any pre-existing conditions could not get it was to alleviate fear and not cause a panic. It was also because of this, that tons of young people were not social distancing as they should have been and still partying and hanging out at the beach. I've been reading tons of articles where all ages have gotten it, all age ranges have died, even healthy people. I've also read articles where those who contracted the disease, who were susceptible, also survived the illness as well. I'm honestly very surprised Tom Hanks did so well since he is diabetic.
I totally get what your roommate is saying, because the virus is highly, highly contagious. It wouldn't hurt to not physically be so close to others if it's preventable. Even with wearing masks and gloves, we honestly can't say how diligent the other person has been. It's only for a bit more time (perhaps two months or more) and everything will go back as it once was.
If nothing else during this time period, it has taught people how to connect with others better and finding workable, virtual alternatives.