You can make a single photograph with exposure time measured in years and do whatever you want in front of the camera similarly you can make a painting by exploding a bucket of paint never touching the canvas. What would be those arts then?
Discussion
Light painting is a thing, which I agree is like is painting with yourself on a long film exposure.
Exploding a bucket of paint on a canvas could be art, but I'd really fight against calling it a painting 😂