I think the sentient droids in Star Wars are a problem, and I think it's actually addressed, just not overtly.
I always wondered why the Republic and the Jedi so casually accepted the idea of using cloned humans as a slave army at the start of the Separatist conflict, despite there being laws against slavery within the Republic. I got that it was a desperate time that maybe called for desperate measures, but in most sources it's not even brought up as a point of contention - everyone just goes along with it.
I never really made the connection before, but perhaps the universal pervasiveness of droids had simply made that entire culture predisposed towards accepting the concept of a slave race, to the point that, with only the tiniest of spin, it slipped past any moral objections and became the norm. A lesson in the dangers of becoming comfortable with even artificial subservience.