I fail to see how any of the mentioned pronouns are ungrammatical.

As for competing needs and such, in this case it’s as easy as using she/her (as maia lists that as one of its pronouns), in other cases it’s usually acceptable to use they/them or no pronouns at all. The only thing that is generally absolutely unacceptable is (knowingly) using the wrong gendered pronouns or using gendered pronouns when the person only uses non-gendered pronouns.

I personally think that the ultimate end game for pronouns in English will be creations of new ones with no connotations (so easy to apply like names) that get incorporated into the language or more likely an eventual move to a single pronoun that applies to everyone. Chinese, for example, only differentiates in written form so would be an easy adjustment. They is every high schoolers preferred choice in essays before English teachers complain.

I'm not sure how the under 20 is adjusting but in my groups of mid 20 to late 30 nobody is trying to disrespect anyone by not using preferred pronouns, but it just slips out from decades of usage, and people just end up replacing pronouns with the person's actual name after multiple times apologizing. The having to remember multiple names when meeting someone just doesn't seem tenable long term.

You can't 'break' a language. You either just follow its rules or flaunt them. If your output is still comprehensible - which 'it' as a pronoun is - it's still language. Back in the day English used to have two pronouns for 'you'. Was merging them both into one pronoun also literally breaking the language?

Really not. Most sentences can be easily rewritten without pronouns. I know a bunch of trans people and have trouble remembering who likes to be called what, so I just reduced the number of direct references. It's not that hard to do, because most conversations don't involve so many subjects that it becomes complex.

People seem to be assuming that this request for certain pronoun usage is made in good faith. Asking to be called "it" is probably just trolling on "its" part. "It" would probably laugh at the people bending over backwards to accommodate.

Have you considered that someone who chooses "it/its" as its pronouns is intentionally trying to break the English language with said choice? In this case, it is Swiss, and therefore it is likely not a native English speaker which could be a factor as well.

That's a problem with the English language though. There's not a singular only version of "they" and there probably should be.

Sure, but that’s not what the page says. The Wikipedia article says that. The page says “it/she”. From what I’m familiar with, the order is usually “singular/plural” and when multiple are preferred I’m used to seeing it written as you notated it here as pairs in a list e.g. she/her, him/his, they/them, it/its, xe/xim, etc, in a list. I guess I can infer that’s the intention, however, which is fair enough.

But that really didn’t have much to do with what I was discussing. That was a separate argument about how we use “it” to refer to objects as a rule. Humans are objects, but we also generally prefer to think of them as objects of a higher order variety. In conversation, we take advantage of this to parse and interpret context more quickly. Choosing to do otherwise makes it more difficult to know if the “it” I just used in this sentence is Maia, some other object, or an abstract point I’m making in this discussion. Anyway, that’s why I prefer she/her.

In English, animals are routinely referred to as "it", and they're obviously animate.

So, at most it could be said that "it" doesn't normally refer to persons... but even that's not true if you include sci-fi in your definition of "English language". When dealing with topics such as non-standard biological sex and/or gender fluidity, older sci-fi works would often use "it" for such people without any implication of non-personhood.