Not just paintings but any art really. You could likely expand that to anything creative.

Someone could make a frame by frame reproduction of a Kubrick film, or cover a Bowie song as faithfully to the original as possible. There is some value in the execution, the talent needed to pull it off. There's so much more value in the idea, the situation that led to its development, the blood, sweat and tears.

It just so happens that in fine art there is scarcity and that drives the price up.