I am not as troubled by that point as you are. There are properties of complex systems that don't have a real independent existence from the system but arise spontaneously in complex systems. I think the word is "emergent properties" (
https://study.com/academy/lesson/emergent-properties-definition-examples.html#:~:text=Emergent properties are properties that,the property that is emergent.)
So I'm OK with something arising from things that, individually, would not make the property but the interaction DOES. I assume that is whence the appreciation of the aesthetic arises.
When I go to the art museum and look at the paintings I find I am automatically attracted to or repulsed by some art. It is isn't the same art that would attract or repulse you (so we know there is no "objective" standard independent of you and I). But I tend to feel it
automatically. Not after considering the potential metaphors involved and then deciding I like the deeper concept behind the painting, but rather more immediately. Not that I don't appreciate those metaphors and deeper layers, but I have to have some visceral connection to the art.
Over the years I've slowly figured out what it is I like stylistically but I didn't go about developing my stylistic preferences based on rational thought and then applied them. I tend to like higher chroma primary colors, strong contrast-y type art, and usually strong heavy lines.