I've had multiple industry professionals tell me that if a story isn't written well, it doesn't matter if they are the best artist in the world. But if the art is sub-par and the story is written well, it still has a very good chance of doing well. Most people aren't completely aware of how professional art should be, as long as it properly communicates with the audience.
Popular comedic adult cartoons have amazing examples of this:
Look at South Park, the Simpsons, etc. That sh*t was not done well AT ALL at first, especially in terms of artwork O_O it's the writing that makes it something capable of looking over, and those shows tanked originally without good enough writing, and some were cancelled.
At the same time, shows like Bob's Burgers which aren't very visually appealing can be off-putting to the point where people don't even give it a chance, even if the writing is done well.
The balance is important, as well as finding a niche and making a reputation out of it if it isn't going to look all that great.