My lady, it's difficult to explain the politics of our world in terms recognizable in this one, but Robin's people are legally enslaved in Morrowind, and generally treated as having fewer rights elsewhere, for although the practice of slavery has been abolished in other countries, all essentially bow to the will of Cyrodiil's Emperor, who allowed the Dunmer to continue the practice and was not especially heavyhanded in enforcing its illegality beyond Cyrodiil's borders. If he did not look so much like a Bosmer, there is every chance he might have been taken into slavery as a child as well. Those Khajiit whose appearance is more beastlike are frequently used as drug mules, forced into work in the ebony mines or egg caves, or kept as farmhands and manor pets by upper class elves.
It is considered deeply offensive to compare a Khajiit to a housecat, or suggest that they keep them as pets.