Languages only have rules only insofar as these rules are followed by a community of language speakers.

Only about 2-3% of Latin Americans in the US use latinx. That's the main issue, most people don't care and they don't really want to use it because it is weird so the whole thing is kinda pointless.

It's bleeding over to other heavily gendered langauges too because of American cultural dominance, and the very very few organizations who use it have made their texts very weird and hard to read. The worst thing about it when they insist on in to much is that usually it kind of signals some kind of admission of defeat. It's like, oh, we failed at making material change so now we're just gonna go around modifying words in ways that will never catch on because American Internet told us it's woke. Ironically it is a rehash of 2nd wave liberal feminists years ago who made a big deal out of gendering male words which were used in a gender neutral fashion, which also didn't catch on because the words they came up with were also ugly and awkward, and the advantage wasn't even clear.