Yeah good question. I would think so. To me, the problem goes away if there are full credits, or even just very clear expectations. I think it’s fine to have people collaborate on a painting, or to have a director and a painter, as long as the audience (and importantly, buyers) understand exactly what it is. What’s problematic is to have an artist charging a lot of money on the basis of their and reputation, and let people think they’re doing all the painting, but fail to disclose they don’t actually do the brush work or make the detailed decisions.

This is somewhat common in other arts too, maybe more common than with painting. I know Stradivarius didn’t make his own violins, but had hoards of apprentices doing the work, almost like a company. Architecture is labeled a fine art, and gets a special exception there, but everyone knows the architect is the director of other people who labor.