We do keep telling them... 
But in seriousness, when people do respond, there's usually a sort of... desperation. I get it, because, yeah, building an audience is hard, and it's not really fun to discover that after all the work you already put into making a novel or a comic all by yourself, that you're not done yet and need to learn marketing (ugh...marketing). They don't know how to market their work, and they don't know why it's important to really think about how they market their work, because they're writers or artists, and they've perhaps been told that if they make good writing or draw well and have original ideas, people will come...but they're not coming. It creates a sense of frustration, especially when the dashboard has a progress bar that seems to set the goal for everyone at 250 subs (I think a lot of people would be happier if that bar could at least be hidden, or wasn't on the page where they upload pages.)
One of the hardest lessons to learn in comics and novels is "you are not special. Just being good at writing or drawing isn't that special; lots of people are", even "having ideas that are different or unusual" isn't special. No matter how good a writer you are, or how good you are at drawing, you have to put your work in the right place for the sort of people who will like it, and you have to put work into making it look nicely presented according to current design trends, and make it very clear what's good about it. Nobody is such an exceptional writer that they can just drop a novel and run and people will read it. Nobody is so remarkable that they can post a novel with a cover that's just an unedited stock photo and some text thrown on there in Times New Roman or Arial font and people will somehow sense its hidden depth; people do judge books by their covers, that's what covers are for!
But inevitably, no matter how often I give the advice of "make a polished cover with one or more well-illustrated faces on it if possible", "don't hand-write your title font or use a default font that came with your computer." Or "You are not the magical exception that will make this unpopular genre popular unless you mix it with a really popular style and tropes." there's always resistance to it, and it becomes almost like a moral crusade, where giving into what I'm advising would show weakness of character or erosion of individuality or "selling out" (god, it's 2023, can the term "selling out" go in the bin? Please?). I'm really just telling them what any publisher would tell them, but hey, it's easier to just keep dropping a link and they can frame it like it's a sign of strength and individuality that they're sticking to their guns and not letting anyone change their very special and unique way of doing things. 