Any art is about provoking some feeling or emotion in you, not how well you can paint or draw.
I took a picture of a wall of old, worn stock bricks because they made me feel nostalgic from the time when i first ran my hand along a similar wall when i was about 5 in 1977. I remembered thinking then and getting the concept of time and how it passes and how things that are here were here a long time ago and will still be here when i'm gone.
So to me that picture is worth a 1000 Mona Lisa's.