Scrivener is not the kind of baseline expectation for a writer that Photoshop is for an artist. And sure, an artist can roll with GIMP and a secondhand tablet, but there's a reason a lot more of them invest any money they make back into the craft - a better program, a better tablet, better art classes - compared to how many writers save up to buy Scrivener. Writers don't compete in a field where their fellows are commonly rocking both natural talent and a $300 collection of tools.

I don't think art is harder than writing or anything, of course, but I've used GIMP and Photoshop, and that shit ain't no fancy note-taker.