Point is that there is no trustless way of doing it. Not your keys, not your coins, full stop. All this platforms (Ledn, Hodl Hodl, Nexo, Firefish) can go offline at any moment and your freaking precious money are gone. Imho, better to leave speculation to the big guys (Saylor & Co).
I've always hated debt because I hate loose ends, admin, and future obligations.
I'm sympathetic to the moral arguments too. If you're opposed to letting people destroy themselves with drugs, why would you support people destroying themselves with money?
I have a harder time arguing people shouldn't take on debt for even productive uses. I do find the "it's wrong but everyone's doing it so I do it" argument lacking.