Female as a noun sounds more formal, distant and depersonalizing than woman. Language is all about nuance.

Well, we’re talking about some random anonymous person on the internet. I think not being personal is quite valid, especially since nowadays you never know how they identify.

In fact, I do find it odd how first people were being offended by others assuming their identity, so some circles just began to use more general and broad terms, and now that’s offensive too.

I tend to refer to singular people on the internet as “person”, and I have been corrected by them or.others, i.e. “I’m a woman!” Like, geez, I don’t care or need to know, to me you’re just a bunch of words, you may be a chatbot for what I know.