Precisely so. OP has no conception of slavery within the Roman Empire and assumes, like most of the historically illiterate, that social phenomena across great spans of time are essentially the same because the same word is used to name them.
But everyone can be an expert in everything these days; and everyone’s judgment is right in their own eyes, irrespective of whether they possess the technical equipment or discernment that customarily accompanied expertise in any field.
Dunning-Kruger is becoming the norm.