A lot of "art" really is pretentious rubbish. Art is not essential to our lives. But neither are e bikes, e cigs, booze, TV and a lot of other things. Art can be one of the things that enriches our lives, and make our lives feel meaningful.A lot of the pretentiousness is more concerned with the marketing of art, rather than art itself.
When photography was invented and perfected, it was felt by meany that drawing and painting would become redundant. This patently was not the case. Drawing and painting are special because they can create scenes that do not exist in the real world. They can create scenes where bits and pieces that exist in separate places are all brought together in one scene.
A piece of art has no value except what someone is prepared to pay for it.Its value can change very rapidly due to unforeseen circumstances. How much would Rolph Harris`s famous portrait of the Queen be worth now?
To me, some of the greatest artists are the so called art forgers, who can copy the works of a wide range of famous artists.