I took as beyond sarcasm, just a simple explanation of how they manage to keep going written in the first person. From my perspective it is incredible anybody could misunderstand.

There is no tone of voice in writing. This is part of the problem with written social media. Some writers will say "only an idiot would believe what I wrote", showing themselves to be adversarial in their communications. I don't think that's you in this case.

It was very thick, IMO.