I'd even say that realistic styles have a much more difficult time making an impact. Stylized games have a leg up at emotional resonance by default.Overall market really loves realism. It doesn't help there is perception that cartoons are something only kids watch or play while live action and more realistic looking stuff are more adult.
Unique art styles can be just as powerful, if not more than some attempts at realism. The phrase, do not judge a book by its cover comes to mind. Also there are so many more styles out there besides realism too. So many. There are a ton of things yet to be explored visually.