It's art cause someone called Picasso just drew a line. The name is everything.
But it's also called art because it's a unique, you can't repeat that color splash, and the mix of color have a reason, if you repeat that it would be just a copy not art.
this is my opinion eh? ^^
Art is the product or process of deliberately arranging items (often with symbolic significance) in a way that influences and affects one or more of the senses, emotions, and intellect. It encompasses a diverse range of human activities, creations, and modes of expression, including music, literature, film, photography, sculpture, and paintings. Traditionally, the term art was used to refer to any skill or mastery.
this is just thing from internet not my opinion.