Hm. I've made this kind of comment to various people, and, looking back, I have to say that the common factor is that the writing in question is to be found on sites for writers, and usually comes from people who say they write for themselves.
My view is that writing is a communication, and you've got to say something that's understandable. Yes, I write for myself, in the sense that I have to have an interest in the subject - otherwise I'm doing something completely pointless. But I think I have to try and interest other people in what it is I am writing about. If I have to say to someone 'what the hell are you on about?' then a polite way of saying that is to ask them who their target audience is, whom they are writing for.
The usual answer is 'I'm not interested in selling my work' which usually ends the conversation as far as I'm concerned, not because I write for money, but because what they are saying is that they're not interested in communicating. They should write a diary.
PS, I gave up using sites for writers a long time ago now.