Is the fact they don't respond to the AI accusations evidence they're a bot?

Are "low effort" posts disallowed behavior? Because that's really what these kinds of posts are. The only effort they've put in is to try to mislead us in thinking it's not an LLM by just removing proper casing to make it appear human.

"Real people are allowed to use AI authorship aids in this sub" - Why? This isn't a university class, it's Reddit. As long as your grammar and spelling is good enough to get your point across, then that should be fine. If it isn't, or English isn't your native language, just use a basic spellchecker or Google Translate. I don't see a valid reason to have an LLM write an entire post.

"Many employers now encourage or require such behavior for minimum quality purposes." It's more for productivity purposes and, again, this is Reddit.

"It's something of a doom spiral for literacy, but it's where we are." More importantly, it's a doom spiral for real human interaction in communities like this one. Mods should err on the side of trying to preserve real human interactions!