You're the one getting the issues backwards (oxygen leaking in vs. hydrogen leaking out, explosion vs. fire). Someone helpfully correcting you is not being pedantic or dying on a hill.

You're the wrong one, sorry.

Edit: Oh, you the same person as that other comment. You're completely imagining the claim that hydrogen didn't kill anyone! I'm not surprised you feel such a sense of superiority if you're that confused about what's actually being claimed here.