There is still a big difference, between exploiting people - and owning people - and literal doing what you want with them. Flock them. Burn them. Rape them - as you please. This is slavery as it used to be (and partly still is!!). And that term gets watered down when applied to something else.

Exploiting people because they are desperate is a big problem. Maybe call it modern day slavery. But it really is not the same as what slavery means for people who are literaly and 100% owned by others.