I think you are right about fine art- having tried to sell in this market for a long time it's very clear to me that quality, at least in terms of craftsmanship and technique, are completely irrelevant. The perfect proof of this is the trend in some high street galleries to sell the visually illiterate scribblings of celebraties as having some legitimate aesthetic value, when in reality it's simply the 'brand recognition' of the celebrity that is the real and only 'value' being offered for sale. ( The perfect example of this being the famous Cricket player who made his 'Art' by throwing balls covered in paint at a sheet of paper- this is not a made up story. To be fair the balls in question were cricket balls, so there was some kind of obscure link between the marks he made and the skill for which he was actually famous.)

The interesting thing about AI Art is that the opposite situation might occur- you could have images that exhibit a high degree of apparent skill and technique- yet be seen as having almost no value because they were so quickly and easily made.

The analogy here might be the golden leaves of autumn scattered in their millions on the ground- each one is actually unique in it's pattern and even beautiful in it's way, but none are regarded as having an real value.