Give me a little credit, okay?
I give you more than a little credit, as you are usually quite knowledgeable (at least in Traveller facts, that is what I can know about you).
I only pointed the fact that our (or at least my) knowledge about how other sophonts' behaivor amounts to nothing, and so we can only judge in our own (Solomani human) views, while others' may well be diferent.
I don't see the Nobles' and Intendants' treatment and view of the proles as just tools or domesticated animals, not even as pets. They know perfectly they are not mindless (after all, they are quite sure about this point), and I believe they really care about them and treat them more humanly tan Imperial propaganda says.
After all, their use of warbots in combat is, among other things, to save troops' (moslty proles) lives, and while warbots (that
are tools) are seen as sacrificable in a suicide charge to help a retreat, troops (mostly proles, I guess) are not.
About the quarters on a warship, having them too segregate would sap the relation among classes. While some segregation is expected (after all, oficiers and petty officiers use to have their separate quarters and messes in most militaries), their interaction must be quite constant, both for the ship to work as it must and for the officers to keep control on the ranks. The proles body language reading by the Nobles and Intendants is as important for this as is telepathy, and that means interaction is important.
The only other ship design I remember that so segregates officers from ranks is the Gazelle, and it's told that this was because it was designed at a time where mutinies were a major concern, something I guess the Zhodani are not too concerned about.