Plenty of commercial art catches on and makes a difference in the world. The output of Disney can all be considered “commercial art”, this isn’t the gotcha you thought it was. You can’t consider these theft engines the same thing as any random technological change because they both technically fall under the umbrella…

“where are... the coders complaining their code snippets are being used by AI code completion systems”?

The only thing that rings out of all that is that one person or group of people benefits off of the free or cheap labour of others.