1. Arguments like this seem to be based on the idea that, prior to AI, most of this type of work was being done by skilled artisans dedicated to quality work product. As I think anyone who actually worked in the industry and is being honest knows, this wasn't the case. There was a lot of mediocrity and worse.
2. I'm not sure the work is "lower quality" depending on how you define "quality". AI might result in an uncomfortable uniformity but at the same time, a lot of AI work product is pretty darn usable because the models have been trained against conventions that, love them or hate them, "work" for the vast majority of end users.