I don't think anyone in this thread has made anything approximating this resentful assertion.
What I find fascinating about your phrasing is that you did not choose to say "They're snobs when/if they stick their nose up so high..." but, rather, you say here that "They're snobs because the [sic] their nose up so high..." as if this snobbish attitude of superiority was nevertheless a common characteristic of people who like modern art. Either way, people who like modern art have been convicted as guilty of being snobs.
I will fully admit that I'm not necessarily the biggest fan of art museums. I know that I personally lack any formal education in art history or art itself. I would much rather go to a Natural History Museum over an Art Museum. And I too was highly skeptical and mocking at the value of art, particularly modern art. ("How is this art?") However, I remember that my first unexpected emotional reaction to art came with a Picasso piece. It wasn't one of his more famous pieces, and I always struggle to remember the name. It was a drawing depicting a knight on horse, of which he has a fair number of them. The left side of the drawing was sketched out in great detail but as your eyesight moved further to the right, it became less detailed and more abstracted. I had just started working on my thesis at the time, but man did that picture hit me hard. I felt an "oh frak the rest as long as its done!" attitude that resonated in a meaningful way to me in that moment. It was unexpected, particularly as I had dismissed Picasso. So I do credit Picasso and this art piece in particular for challenging me to revaluate my still evolving views on art. My knowledge of art is still mostly non-existent, but I gained a growing appreciation for it.
What's interesting is that a number of people on this forum (myself included) have expressed a similar experience of skepticism in regards to non-mainstream TTRPGs - what TTRPGs are, what they can be, how can/should be played, etc. - after being challenged by people with knowledge of these non-mainstream games. It doesn't mean that these other games are inherently of a higher quality than D&D, but simply that they can expand our appreciation of TTRPGs and our experiences thereof. Sometimes reflecting on our own negative reactions can help us identify our own biases and preferences with greater clarity than without those experiences, which I always find insightful.