Most of them barely do any better than just shaking your hands in the air,
I saw one of these once where someone scratched “4. wipe hands on pants” on the instruction panel.
The trick is to shake dry in the sink, then rub the moisture up past your wrists onto your forearms, creating a thin layer. Then use the dryer, repeating the rubbing motion spreading the moisture out until it’s gone.
because they’re simply spraying your clean hands with all of the shit and piss particles that are floating in the air.
This is the real problem. Apparently, the Dyson air blades are the worst: https://arstechnica.com/science/2016/04/dyson-dryers-hurl-60x-more-viruses-most-at-kid-face-height-than-other-dryers/