Er...
Why would that cause us to care about art, or find it appealing, though?
There are several reasons to care about art, without it even being about art itself.
1. What's represented in that picture or sculpture.
As a trivial and silly example, take porn (or the many nude paintings and sculptures which once served as softcore porn and now pass for fine art.) You're not programmed in any way to like porn as such. It's just that your brain can decode the scene in that picture just as well and figure out "mmm, naked woman" or "mmm, people having sex" and that idea triggers your own reproduction pathways.
Same idea for other subjects. There are symbols like food, a tranquil family scene, etc, which remind you of your own needs. Not because it's art, but because your brain decodes the represented scene just as well.
2. As a learned social behaviour. We're social creatures, and we learn to act in whatever ways we think will get us accepted in a certain group.
If that group happens to be audiophiles, we learn to rant about the subtle sound qualities when playing MP3's over an audiophile-grade network cable or off a good hard drive. (Both absurd, but I've actually seen people argue that bass sounds fuller off brand X of hard drive.) If that group happens to be lovers of classic music, we learn to rant and rave about the feelings evoked by a Tschaikowski or Mozart, and if that group happens to be the local high-school hip-hoppers, we do the same about Eminem. Etc.
But equally it could be about belonging to the local Linux User Group or to Slashdot. And I could swear that some people bleat against MS or repeat some memes like a parrot, not because they've actually got any objective reason for either, but just because they got the idea that that's how you show you belong to a nerd group.
To give an extreme example again: think The Emperor's New Clothes. It's not a fairy tale, it's an insightful observation of group psychology.
In a nutshell, this latter effect isn't even about art or about any particular behaviour, it's about being social and fitting in a group. It's just a group survival strategy. We want to be in a group, and from there we invent our own means of defining the group and of showing we belong there.