It is really a pretty simple case
I have never spoken directly to that creator about exactly what motivates them to produce their creations, nor about exactly what goals they hope to achieve by creating them but there are a lot of assumptions in your statement.
. Like if you're not doing what the majority of erotic game consumers want then you're doing the wrong thing.
But is Lady Tlaero doing the wrong thing when she makes one of her excellent creations (with Mortze) while refusing to pander to the "we want to have sex with all the ...." majority?
Is Shark doing the wrong thing when they makes their excellent games using lower definition/detailed models instead of pandering to the general demand for higher definition artwork?
. That the only target audience for their content is the one they currently have, or had in the past.
. That you must keep improving yourself and "moving forward with the times", that it is wrong to find a level of competence that suites you.
While it is important to listen to the advice and suggestions of those you trust, and equally important to consider why they are saying it, it is up to the creator to decide what is relevant to their motivations and goals.