Especially in the era of AI. I figure if anyone who knows me can be fooled by AI, they don't know me well. That said, I think you're confusing "niche" and "style." Because your definition - while I like the idea - isn't how the dictionary or the internet has used the term for decades.

If this were Quora, I'd sign off with my "expertise" as Queen of the No-Niche Niche. (I set out to dominate that niche, years ago - even Darren Rouse (ProBlogger) agreed that it was working for me, so "@#$% niches.")