drcongo is making a statement about the population, and readers can be trusted to not be so confused as to think that this is the official speech of the people.
If drcongo doesn't mean to speak for "Anyone who owns a MacBook Pro with Touch Bar", drcongo should refrain from using those exact words. And you should probably refrain from speaking for drcongo.
It's interesting that you chose the term "sweeping generalization". It almost always carries a negative connotation. In fact, it's considered to be a logical fallacy (see https://www.logicallyfallacious.com/tools/lp/Bo/LogicalFalla...).
> I find it really annoying when someone says something like "everyone likes cats!" and then someone, inevitably, will hop in and reply with "ACTUALLY, I hate cats."
I'm sorry I annoyed you. I find it annoying when someone speaks for me and gets my opinion wrong.
edit: Is it really "inevitable" though? It happens every single time? (just kidding)
> This isn't a mathematics proof.
No, but communicating clearly and honestly is important, even in casual conversations.