I guess they'd argue that the author's identity shouldn't matter and that one should just judge the writing on its own merit. The problem is that we're drowning in information. AI makes its trivial to generate authoritative-looking nonsense. Evaluation is costly. So I prefer to read something which the author has associated with their own identity (which means there's a cost to lying), or has provided some credentials to prove why their opinion matters. Of course there are exceptions (Gwern comes to mind), but I'll only trust them if they're recommended by other writers I trust.