Earlier quoted context omitted.
Yeah, I definitely don't like hearing that, because phones can fuck right off. That's not my computer, that's someone else's computer that they're letting me use. I'm not going to get a smartphone just to use Signal. I'll use my spare laptop instead, that I already have, and just run Signal on it. It's not going to get compromised by Boogeymen From The Scary Browser Tab because I won't be running a browser on there.
I think that is a fine plan for the "people who have spare laptops they use to run single programs" people.
Well, a spare computer is cheaper than a spare phone. You can get those suckers free on the curb sometimes.
Anyway, I don't think we should give up on user-controlled platforms so readily, even if there's a slight short-term benefit to privacy or security.