I was quite peeved when I made the original post, too peeved for complex thoughts, so I wanna add some additional detail and nuance here, actually.
I don't think adults NEED to watch stuff for kids. Like, I think you definitely can derive meaning from childrens' media even as an adult, but if you can't connect with stories that are about kid stuff, if you don't feel like you can relate enough to kid main characters created for children, then there's nothing wrong with that. Like what you like.
And relatedly, I do think adults SHOULD try to seek out media intended for adults. There's a lot of good stories made for adults! There's great stories that reckon with themes and content that kids' stories don't or can't! There's whole worlds of fascinating, life-changing stuff out there.
Now, all that being said, I think problems start to arise when we treat that "should" that I said as a statement of morality rather than enrichment. I think you should watch movies for adults, but not because you have a moral imperative to do so -- you should do it for YOUR OWN edification. You should read grown-up books because many of them have great stories that you will connect with.
The original post is me vagueposting (because I don't wanna bother anyone over lukewarm media takes) about a post I saw that treated reading adult-intended media as some sort of moral imperative. Outright saying that you should be embarrassed and shamed if you only read kids books. And I don't vibe with that.
Shame is a dangerous weapon. I cannot condone shaming people for having limited artistic tastes in the same way I can't condone shaming people for eating unhealthily. Like, we're all progressive enough to know that that's bad, right? Shaming fat people into being skinny doesn't work, we know this, and even if it did, it would still be needlessly cruel.
Like, if a grown adult really does ONLY engage with stories for kids (an archetype of person that I suspect is far less common than people assume), then sure, I'm probably not gonna look to them for nuanced literary analysis. If they try to present themselves as any kind of authority on storytelling or media analysis, I'm probably not gonna take them seriously. If their experience is SEVERELY limited I might poke fun at someone (tabletop gamers who only play D&D, readers who only ever reference Harry Potter).
But like, if someone just mostly watches kid stuff...it doesn't affect me! They aren't hurting anybody! What business do you have shaming a stranger for that? Who gives a shit? Unless they're like, a professional reviewer or something, nobody OWES you media literacy! Argue with bad takes, encourage people to read more, that's all fine, but the brazen gall of "you should actually be embarrassed for this and I will shame you for it" is just so petty. Honestly? Grow up.