That sounds like you're suggesting they'd just be trying to kil everyone instead of trying to treat them. Are you confident in your knowledge of what ventilator is, how it works, who needs it, who can administer it?

It feels like you're intentionally trying not to understand the point that just forcing air into someone isn't a valuable thing to do. What matters is how, what degree, the amount of control, volume, timing, and the ability of medical professionals to control the parameters. Otherwise you could just use your leaf blower.

Putting air into someone is the easy part.