Thats fine if you are only interested in entertainment, and only use that as your yardstick to measure good, bad, or whatever. I also understand you can be entertained by art that doesn't make you feel uncomfortable. Nothing wrong with that.

But being comfortable and feeling safe isn't what art is about for many artists. Many of us prefer to be challenged by the art we engage with, and we have our ways of measuring good, bad, and whatever too.

Those who prefer the entertainment side ususally want to "check their brains at the door" (and I don't say that negatively, as I too, on occassion, want nothing more than a little mindless entertainment--isn't that what cable TV is for?) and not have to think about the film, play, the painting, etc. Those who prefer the art side usually want to be challenged to think though, and so that is one measure we use to evaluate a work of art. And there is nothing wrong with that either.

The two aren't always mutually exclusive, at least in theor, but often are in a practical sense.