While I have my fair share of criticism with the game's social aspect, this is almost definitely not one of them. The game may be leaning a bit too much towards being restrictive while also not having enough GMs to moderate in real time (I think the latter is really important). However at the same time I'm also never a fan of those 'stereotypical bro'-spaces that OP describes. More often than not, it's used freely to cudgel their way to be rude, callous, and/or inconsiderate without being held accountability. Besides, these 'bro spaces' is already almost everywhere in the internet. What's the problem having just FFXIV not being your typical bro space?

As for the actual comments... I don't find them funny. It operates under the assumption that the other stranger being your 'typical bro' when you could be possibly talking to 'non-bro'. It's cheap at best, and rude at its worst. I would just simply shrug off or ignore the comment.