Art vs artist doesn't apply when the artist is making bank off their art.
A better example would be something like Notch and Minecraft. Notch made Minecraft, Notch sucks, but he sold it and makes no money off it anymore so who cares if he's the worst. JKR is a different story, and every new Harry Potter thing supports JKR.
If you're specifically getting specifically "vegan" products like fake meat or the like it can get expensive, but staples like rice and beans are cheap, vegan, and nutritious.