Most of the time I’ve seen it used is when someone is doing something to vent, like posting “ugh men”, and then someone comes in trying to start an argument with the actually not all men schtick. And if you refuse to engage they’ll reply to entirely unrelated stuff trying to argue the same thing (which is what is implied by the breakfast scene).

Specifically used in the same way that most people on here dunk on reddit debatebros.