Doesn't the majority of the market already buy based on trusted reviews or familiarity with the author? Until the quality of the books improves, nobody is buyi

Doesn't the majority of the market already buy based on trusted reviews or familiarity with the author? Until the quality of the books improves, nobody is buying these except for novelty. As for stopping the influx of junk, wouldn't it eventually settle down after all but a few names fail to cash in on this?