Aside from "killing us and giving us cancer every single day", isn't "diatomic oxygen" the stuff we breathe every single minute and need to survive?

I'm not normally one to miss the sarcastic or satirical posts, but this one seems oddly earnest.

> isn't "diatomic oxygen" the stuff we breathe every single minute and need to survive?

I think they're referring to oxidative stress [1] caused by cellular respiration.

[1] https://en.wikipedia.org/wiki/Oxidative_stress