Completely wrong.

Globally over 95% of hydrogen is sourced from fossil fuels, particularly natural gas wells. Electrolysis is very limited to niche applications or token projects.

If you can do that at a meaningful rate you might as well install ev charging and just not electrolyse when cars are charging

That’s not a thing. Anyone who’s seen hydrogen being split from electrolysis knows it takes a lot lot lot of electricity and is very slow. If two people needed to fill up in the same day it would run the well dry.

Your understanding is entirely wrong.

Most hydrogen fueling stations receive it from the next steam reformer, which will make it from fossil gas.

this is the case while they're in the hype building phase, when people are paying attention

if hydrogen even gained widespread adoption, it would be mass produced via steam reforming of natural gas

(which is why the oil majors are the ones desperately pushing it)

Okay not driving it around then. But somehow it's worse. You still have to build the special tank and the special pump and also get an electrolysis device that is big enough to create enough hydrogen and also you have to get heaps of power somewhere that could instead be just straight put into a battery in a car. Make it make sense. What's the point? Who is willing to do that?

Isn’t this bad? This means H2O molecules are being destroyed and the water is not returning to the water cycle to be reused. We will literally run out of water if everyone did this.