An intact slave's room found in Pompeii's ruins
Slaves and slavery were extremely different in Pompeii and Herculaneum then what we usually think of as chattel slavery as the default and only slavery that ever existed. An interviewee either doesn’t understand this or made very sweeping claims.
 > “This is a window into the precarious reality of people who seldom appear in historical sources that were written almost exclusively by men belonging to the elite, and who as a result risk remaining invisible in the great historical accounts,” -
Many slaves were captured and famous intellectuals (Aesop is a famous example) or educated and used as tutors, they were not as modernists assume to be universally ill treated and abused. Slaves in Herculaneum were able to become free and it was a very racially diverse place where being a former slave of different racial background did not mean you were unable to have social mobility, many of the wealthy people of Herculaneum were indeed former slaves. Slavery was not a permanent state of being and the very elite the quoted author complains about often did write about slaves at least in name; the former slaves would take the last name of the old master and records were excellent.