Although I agree that there will always be produced "content" that is worse than other, I don't think there's any cause to compare human labour to "AI" slop. People can be stuck in jobs they don't care about, most often because of unreasonable work conditions or wages.
"AI" produces slop because that's what it is made for. That's its dire success criteria, making something that's statistically just above but not quite terrible quality. Manufacturers and employers prefer that over human labour performing similarly, i.e. quiet quitting. Because so far "AI" doesn't have workers' rights. Or higher aspirations.
And I cannot agree with your point about "telemarketers with accents" as a marker of low quality. That phrasing is a whole thicket of weeds that I'm not wading into.