It is a circular problem:
When you care about art, you usually got some sense of aesthetics and feel more likely unable to bring yourself to ship anything that looks simply bad to yourself.
When you don't got the eyes to see bad art as what it is, you also won't see it as a problem that really needs fixing so you care less about it than is good for you.
You have to strike a balance there. Games are visual independend of the style. Yes you play them – but before you even decide to pick a game up, you see screenshots, trailers or game-play-videos. If that doesn't look interesting, you can have the most interesing gameplay in the universe and it wouldn't sell.
A bit like in films, where the best script can be destroyed by bad acting or the best acting can be destroyed by bad scripts as a passionate creator you have to realize that this is a serious issue.
Amateur filmmakers might figure out directing techniques to get top notch acting out of people who never stood in front of a camera before or they might search very patiently till somebody crosses their way who is a natural talent.
The thing is to precisely know your limitations and do the best you can do within them, sometimes even by not copying the best, but by finding glorious short cuts that sometimes create whole new genres.