Perhaps, but unless one of them is Walt Disney, I've never heard of them - therefore their fame does not impact my valuation of their work. I can see myself spend 50 bucks on a (to me) unknown piece of art because it is pretty. Spending more would require an additional connection - fame of artist, depicts something dear to me, seems like a good investment, etc. etc... only being pretty isn't enough.

If you want to think about it as art as just a thing that's made

Canvas or paper will be a few dollars to maybe 10

Paints maybe another 10 per painting by the end.

Then maybe a professionals time for like 100/hr. Idk if you can even hire a plumber that cheap.

A 2 hour painting should cost maybe 400 by an unknown but professional.