The quest, the yearning to prove that Being is better than Not Being, or even, that it is distinguishable, with hindsight. The difference between Art and mere pretentiousness is whether you are in pursuit of Significance or Wealth. If you don't find the given Article appealing, it could still be Significant. You might hate it. But if you don't notice it, it isn't Art.
Modern architecture tries hard to be noticed.
It's ugly, for the most part. But, by my generous definition, it is often Art. I like the Fred and Ginger Dancing Building in Prague, which is not to everyone's taste. But I hate the Manes opposite which is a listed building of a style I never found appealing. That too is Art.