You're being "called out" (ugh) incredibly politely mostly because you were being a bit rude; "tell me X without telling me" is just a bit unpleasant, and totally counterproductive.
> because someone is some sort of celebrity that I should cut them some slack.
No one mentioned a celebrity. You're not railing against the power of celebrity here; just a call for politeness.
> Everything he pointed out is literally covered in the GCP Tasks documentation.
Yes, e.g. as pitfalls.