Some people will just swallow propaganda, and defend corporations even going against their own interests.
To be clear, i'm not against bluetooth audio, heck i even have a set of high end Jabra earbuds, but those are not a substitute for my AKG k702 or my Audio Technica M40x. Having an audio jack is about having an option, and we know companies are lying through their teeth because somebody managed to add an audio jack to an iPhone without losing any functionality at all.
It's useless to argue with this guy, he's just going around shouting that the audio jack is obsolete, doesn't even know what obsolete means and is just throwing a hissy fit.
He can't name a solution, it's just everyone's else problem that we want to use the better option.