The Rebel Alliance was fightin’ for Systems’ Rights, and against the Empire’s unjust tariff policies!
And droids are happy servin’ their masters, everyone knows that! Why, poor C3PO would be heartbroken if some outside agitator from some big-city planet like Coruscant tried to take him away from his beloved Master Luke!
Previous generations grappled with these issues while watching the animals pressed into service as household appliances on the Flintstones. Perhaps the droids resign themselves to thinking, “it’s a living.”
Were they aware of their environments and able to react to stimuli in that environment? Unquestionably. But that’s also not a big deal. The OP is clearly referring to something else, but people are notoriously sloppy about defining just what that “something else” is.
I feel this was settled, in passing, back on Page One: however you define sentience, or anything else, it’s the thing that I freely grant that you have while I’m having this chat with you. And, as far as I can tell, you’d do likewise for me; and, as far as I can tell, Threepio would do just fine compared to either of us in a Turing test.
Whatever we’re doing to convince one another, it looks like he’s got it too.
OK, if you put a discolored smudge on Threepio’s forehead, and showed him a mirror, would he attempt to wipe the smudge off? That’s the best test anyone’s ever been able to come up with for anything that might be called “self-awareness”, and I don’t think anyone doubts that Threepio would pass that test.
There’s a great short scene in the Rebels episode “Twin Suns” in which Ezra decides he needs to cross the open desert. Chopper doesn’t want to. Ezra tells him he can follow the hills (filled with Sand people) and probably find a town.
Chopper looks at hills, back at Ezra, back at hills, back at Ezra, gives a great frustrated sigh, slumping over very human like before following Ezra.