A lot fo what passes for art is exploration of color, and texture, and such. Which is legit. I spend a lot of time doing color studies, exploratory sketches, ect, because I'm exploring - the output though, is not "art", in any sense - and that's what most "objective" art is - explorations into form, or color, or texture, that can be interesting on it's own right as part of the process, but it's not finished work. The anatomical studies by the masters of the human form in chalk and conte on tinted paper is beautiful stuff, but it's not finished work. It's exploratory. It's part of the process, it lets us peek at how the artist is approaching the subject.
I "get" some modern art, especially if it's color based, it's the inevitable concluding point of impressionism, which put color and light ahead of everything else, and exploring the world of light. But they reached the bitter end of it, and it's time to return to the source, armed with what we learned, not stay there for decades, getting moldy and cliched.
Most people get it. I took relative to the the Met in NYC, they had no clue about art, but wanted to. I wandered with them around, looking at the wonders in there, and they stopped in front of a Van Dyke. Spellbound. I let them sit there, and take it in. Didn't talk about it.
We went to a cafe later, and I let them talk. They were going on and on about how they get it now, the darkness, the color, the bright highlights, how it popped off the canvas, how it was just a portrait but it spoke to them...I just said 'Welcome." They got it. They got art. I saw someone else do that in the Monet room there. I've seen people have the light bulb go off over their heads in other museums.
There's a small painting, by a master, that hangs in a museum near me. Every once in a while, I need to go spend some time with it, taking in the composition, the form, the color, the incredible brush strokes...that's art.