Butch specifically says that he knows his limitations and is willing to stretch them only to a certain extent. That may keep him and artists like him in business for now, but eventually they're going to disappear. If an artist isn't willing to grow, change and evolve along with the industry, they will eventually fall victim to their own stagnation. And they certainly shouldn't be training others to follow in their path of mediocrity because they're not training a new generation of artists. By the time these young apprentices are ready to go on their own, what they have been taught will be considered below average and they'll be even farther behind than their teachers.
Do I hold myself to the same standards I preach? Absolutely. Which is why I put the tattoo machine down ten years ago and picked up a pen because I accepted the fact that tattooing was not what I was meant to do. I had nothing to offer the tattoo industry as far as my art was considered. I wasn't about to thrust my mediocrity upon the industry when there is already so much better talent readily available. I did, however, find my place in the industry and have been very happy that I didn't waste the last ten years pursuing the wrong line of work.
That being said, I still enjoy drawing and being artistic and I would never discourage someone from pursuing their passion. But why should it matter if your canvas is paper instead of human?