Is it a key difference though ?
If you exploit people that has only one choice : Taking whatever shit job they can… Barely paid enough to survive. They are not slave per se but their boss couldn’t be happier to have cheap labor that has no leverage whatsoever and would accept anything anyway. It is farming desperation.
To some extent I think some big business are borderline slave owners even though you could say all their slaves could leave their job and die from hunger if they wish to do so. They could voluntarily choose death over basically being owned by another human but surprisingly enough most dont do that.
I would say there is some truth to what he says :
https://www.sektion-landwirtschaft.org/en/news/artificial-sweeteners-create-deceptive-sweetness
Although it’s not like a definitive answer from the scientific community.