I've seen plenty of motel paintings, watched plenty of Bob Ross episodes, but the comparison doesn't seem fair. Motel paintings are often printed - you can tell by the CMYK dots if you come close enough. Ross at least seems to use actual oil paint on canvas supported by real solvents which seems a lot higher quality than the usual school process using acrylics or temperas. (Although granted using liquid white seems a bit dodgy).

So what is Ross missing. Not enough detail? Does not take enough time to paint a painting? Not enough paint on the canvas? Not photorealistic enough? Too photorealistic?