OP here. I wrote the post myself with no AI (modulo grammar checks).
What makes you think it's AI-generated?
The answer is quite patently that, in this brave new world, people with noticeable writing skill will face that false cry on a regular basis from the literary lowest-common-denominator.
I keep getting people saying they think my posts are AI-generated because I use hyphens in sentences (not M-dashes though, I can never remember the compose key for it), and because I use the term "load bearing" in a pisstakey way - like for instance, "yet another instance of load-bearing idiocy by management".
Not directly the answer, the only weird part (albeit not LLM alike attribution) would the use of 'reach out', after the negative attitude towards corpo-speak. "Contact", "call," "talk", "meet", etc. would be a lot better/normal/human words.