Personal struggles? Sure. An ugly painting that opens the door to me learning about a war or revolution or system of government I was previously unaware of? Or a style or medium enabled by a new technology of the time? That can be fun.
I live near a large collection of wildlife art. I can't say many of them are beautiful. But noting how wolves have been portrayed over millenia, and across cultures, was a genuinely interesting exhibit. (In America, they went from ferocious creatues to essentially dogs. Most wolves in art today are not physiologically wolves. Akin to how most butterflies in art are dead.)
Do not mistake what I said for some claim that all art is bad/ugly. There is a lot of art I do enjoy. What I enjoy is personal. I do not fault someone else for enjoying art that I don't enjoy in general.
I find Da Vinci the engineer makes things I find nice to look at, but he did many other paintings and I would need to see each to make a judgement on it. Knowinghis issues just makes me wish he lived with modern medicine where we might be able to treat him - and wonder what he could have done if he had modern training - many of his machines have obvious flaws that his day was not advanced enough to know about. That is me though, maybe you are different - this is a personal thing and so it is hard to call anyone wrong.
The comment you responded to was about "historical, thematic and philosophical aspects to art". Which is something entirely different.
This really reads like someone knee jerk dismissing something they never bothered took at, but just assume it's stupid.
you can enjoy them that is okay. Just don't think I'm wrong for not.