Farm automation allowed a single man to plow many fields in the time one field would have taken.
Automation allows one person to accomplish more with less.
Tractors didn’t reduce the demand for product, but increased it many fold.
Automation increases demand; every time.
Sure, automation increased demand for food, but demand did not increase enough to not destroy 5/6th of farmers jobs.
Now this may not be a bad thing at all, that's not the point, but I am not sure "hey demand for art will increase but 5 out of 6 artist jobs will no longer exist!" is a super hopeful statement to artists.
[0] https://ourworldindata.org/grapher/number-of-people-employed...
Yours is a different definition of demand than the economics definition, which is basically the amount customers will buy as a function of price. Higher demand means buyers will pay a higher price for the same art.
Automation increases supply, which increases the volume of art consumed, mainly because it is available at a lower price. That is shifting to a different point on the same demand curve, and doesn't mean that demand has increased.
Just look at the dairy industry. Pre-automation sales numbers vs. post-automation sales numbers.
This is true for every industry on earth, and doesn't care about the pedantic definition of demand. Consumer demand = more purchases. More purchases = more revenue.