You would need to reduce poepulation by a lot in the first place as there are not enough resources to build and mantain so much AI and robots.

allow us to less work and enjoy our lives more Healthy

This is already the case in most "western" countries, the question is how much do you need to "enjoy" life.

There is in any case a much more interesting conversation to have about what art is, what an artist is, what the creative act of making art is and what makes an artist.

There is a point of view that art is the "healthy" transformation of pain and suffering.
If so, would we really want the whole world to be artists?