It's because people do talk about their kids like that. All the time. Parents make stupid jokes to other parents. It's what we do to convince ourselves we're not as boring and irrelevant as we actually are. Do you not have any Facebook friends that post a bunch of stupid videos of their boring kids non-stop as if it's high-quality entertainment?

Normal people do this shit. The reason people outside this community think it's normal is because it is. You need to understand that. This community is diverse, but the connecting thread is that most of us are denizens of the internet, on here non-stop. People who live in the real world and only check their facebook/twitter a few times a day and not at all on weekends because they're busy living their lives recognize this.

There's a reason we call them "normies". Instead of saying they're stupid, maybe try watching their behavior and instead of making fun of it, recognize that normies do normal things and perhaps we are the ones who have altered perspectives.