Being forced to work 8-12 hours a day, but free to go about your business the rest of the time is a very different scenario to being owned and having your offspring becoming another persons property.
Chattel slavery goes way beyond forced labor - both are terrible, but not equally so.
“The revolution ended slavery in Saint-Domingue but not forced labor. Louverture and several of the early governments of independent Haiti used the army to impose forced work on the plantations”
nonetheless I'm disappointed; the assertion looked so juicy and worthy of a deep dive. you made it sound like "academia" was conspiring to demote slavery to forced labor under specific conditions. yet no evidence of this is to be found in the linked text.
rather, the summary makes a point of distinguishing slavery from forced labor. granted, it doesn't define either term (as a proper paper would) but it doesn't pretend they are interchangeable either.