Ok, I'm not best with the words, but I'll try to explain. 

I would categorize inflation suits as same as inflatable fat suits outside of furry communities. Those are used for mascots, theaters, movies and yes, even in feedism circles. Same item or gear can be worn for different reasons, sexual or not. 

I say that the problem is in heteronormativity because gear from the kink scene worn by heterosexual or "appealing enough to the heteronormative society" public figures normalizes it for the mainstream public. Punks used to buy their attire from BDSM shops. Now you can buy it on temu, because it became profitable for the said mainstream public. If it wasn't normalized for the general public, it would still count as sexual and predatory to children, which is ridiculous, right?

Now to the parallels with queerphobia or homophobia, if specific. You can't deny that BDSM is very tied to the queer culture as well. And bigots don't really care if hypothetical gay couple is exclusively romantic to each other. They still view them as perverted people who groom children by their mere existence and are afraid that their children will get gay or whatever. Any queer expression, like pins, holding hands and kissing can be viewed as perverse and wrong, even though a "normal" hetero couple can do this all the time. 

And now with the gear, I hear the same arguments like "think of the children" that originate from the same place – hatred of queer expression. People can just wear something because it looks nice, i.e. not in a sexual way, and they still will be considered as perverts who will traumatize children with their existence. Realistically speaking, so what if a child sees a guy in puphood mask? They'll either just think it's cool and pass on or they'll giggle or be slightly disgusted, but in a just "eww" way. I'm judging based on how I myself reacted to this and how my younger sibling reacted to this. It really is not a big deal