(I didn't, largely since I've never watched a single episode, but the psychic damage and whiplash of Wholesome Pony Show having said this line was too fuckn much for me)
EDIT: More replies than upbears now. It’s probably an official struggle session now (although most of it is that one person). One must imagine SisyFEWs happy.
Look in this thread. The old tiresome "X is for babies" symptomatic
wriggling is on display. 
What the hell have I wrought
I think it's so inevitable that even bringing up that particular show is going to churn out a similar vibe to what happened in the early 2000s if someone so much as brought up furries.
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At the risk of setting them off again, I argue that Gambo, at its height, was like that, and unlike FiM or even R&M it had painfully mainstream saturation. It was basically impossible to exist in public anywhere with a line or a waiting room, where a TV or a magazine could be found, without "WHICH MURDERFUCKER IS ON THE IRON THRONE THIS WEEK?"
headlined everywhere, for years. I had to involuntarily learn a lot about that show during that time.
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The banker-born sexpest failson creeps that ran that show had everything going for it and still drove it into the ground with sheer fucking hubris with a side order of resentment toward Emilia Clarke because she started pushing back and didn't want to just be their (CW: SV)
spoiler
actually-weeping-because-of-contractual-coercion SV plaything on camera anymore so they character assassinated the character then had her murderfucked as petty retaliation.
Maybe it's rooted in weird gender coding stuff? I do find it odd the selective salty-ness of the net being weirded out by one children's animated television show but not another. I'm not even on the "let people enjoy things" tip, but it's just weird the show about unicorns, rainbows, and friendship gets mad hate but if it were a show about kiddos fist fighting against the forces of evil and you get a pass.
It's always just "You are grown, you are watching a show for girls." It's never any valid leftist critique one could probably make in a integrious way like the original poster talking about centrism for example.
Personally I don't rock with MLP. However, I dig lots of the new generations cartoons like "Adventure Time" and "Rise of the TMNT" which are "for boys" but no one bugs out about that. Which is kinda telling to me.
As if we all didn't go see Barbie by the way. A movie about a product "for babies".
A lot of it is, "girly" media are constantly ridiculed and villified to an extent that hypermasculine Vin Diesel shlock never is. but ima be honest here, what put me off in regards to MLP where the fedora guys fantasizing about horse ass all day.
I think a recent version of "X IS FOR BABIES"
came from people that didn't just not see Barbie (it's fine, no one has to watch it) but made "didn't see Barbie" into some badge of maturity (or in some cases, performative masculinity) in contrast to Oppenheimer (it's fine, you are allowed to watch it, or not) as, once again, MATURITY(tm) discourse.
I feel like I've seen both of these films by way of people's reactions to them
I've actually seen neither
This is how I see most films these days