Art is about being Expressive and it is about being Creative.
It fulfills two needs. It's not about how well you can do something, it is primarily a way of getting an idea, point of view or thought across to somebody else... or just yourself!
And being creative has a positive personal result, a sense of satisfaction of having accomplished something... it makes you feel good... and that is a benefit to others as well.
Visual art is just a non verbal form of expression, but there are many others, an unlimited number of ways, writing, poetry, music, film, etc. that make 'I'm no good at art' an incentive to explore them!