Ventilators aren't deadly, they're just not very effective at saving COVID-19 patient's lives. You get put on a ventilator once you're at the point where you're going to die unless you have air forced into your lungs because you can't breathe naturally anymore. Even then something like 80% still die, but that's better than 100%.

HCQ, however, is not effective. He doesn't attack HCQ because it works, but because it doesn't. Here are the 3 largest studies of the efficacy of HCQ I'm aware of: One with ~1400 patients in NYC that shows no difference, another with ~4500 patients in the UK that shows no difference, and another with ~2500 patients in Michigan that does show some difference, although it's worth noting they also tested azithromycin in that study and using HCQ in combination with azithromycin actually worsened patient outcomes.

Bottom line is if HCQ actually worked, we'd see that in patient trials. But most trials point towards HCQ making no difference.