Quality is subjective, as everyone keeps saying. People have different taste.
However, your taste changes throughout your life. Kids like certain flavors, certain kind of entertainment. Other tastes develop as you get older, or your friends and your life experience expose you to different ideas. There are some "acquired tastes" that not many people have, but if you try it, and figure out what's good or interesting about that kind of entertainment, or book, or food... eventually you realize it and you've got a taste that not many other people have, you've figured something else out and expanded your possibilities of enjoyment. It might even be difficult at first, but then it pays off!
Those kinds of tastes are never going to be popular as big-budget money-makers. For a business interest trying to invest money and make profits, it's always going to be easier to go for the "lowest common denominator," whatever already has the most gravity. That "black hole of taste" effect reduces the amount of creative exploration we can do as a culture, a species. Only the lonely deep-space probes go off into the areas that aren't "already popular and everyone likes them" to find something new.
For me, that's the reason to care about some other idea of "quality" beyond "hey I just like to consume this stuff." Like almost everybody, I have entertainment (or food, for that matter) which I just like to consume because it's familiar, fun, I know what it is and what I'm getting, etc. The comfort food of TV, anime, books, whatever. But I know there are other reasons to like and be interested in things, so I also try to support work that I think is interesting, pushing in new directions, doing something that seems worth exploring but might be underappreciated, a weird experiment that might fail (but that's how we learn from experiments!) and so on and so forth. Quality: the thing not everyone's doing.