I think it's pretty reasonable to compare LLMs to slave labor personally because LLMs also steal the labor of human beings and take all the profit. That money never comes back to the average person, it's all so a small handful of sociopaths can watch the Number Go Up in their bank accounts.
I understand Gaz's point of view but believe it is coming from a place of nihilism where they genuinely think we have no agency to change the shitty things about society as it is currently. They have fully bought into the narrative of "progress".