How about a more accurate example?Put it under this point of view. Let's suppose someone you know buys, tortures and kills small guinea pigs for relaxation and fun. Would we think that it's okay because he doesn't commit a crime (suppose he do it in a place where it isn't a crime) and they aren't human beings?
Suppose someone buys a super realistic sex doll and does unspeakable things to it, is encouraged to do such things to it by its creators/sellers, and even has a "safe place" in which to do so. Aside from them being into some pervy shit in and of itself, how is this any different? Since that's all the hosts are; super realistic sex toys.
The fact that they're gaining a form of sentience is neither desired nor intended. They're just walking, talking dildos and latex vaginas to the people in the setting, and have been for 30+ years of conditioning/acceptance.