I guess, though the different robots have personalities with emotions and a strong instinct for self preservation that appears to war with their sense of duty, loyalty and self sacrifice. I think the series's sense of what the 'droids actually think and feel varies a bit with the current needs of the story.
It seems, at least, that barring a few people who need the Force to accomplish a particular goal, they could pilot those extra X-wings with 'droids and save some human lives at least (since those space battles tend to end in carnage and were often about creating a diversion so Luke or whoever could do their special job anyway).
Another question is why are 'droids always regarded as male (where the ones that don't just whistle and beep always speak in masculine voices). I get that we 21st century humans tend to assign genders to things, and most people are uncomfortable with beings that have no gender (which makes it hard for people who really aren't on the gender binary), but in an environment where there are so many other intelligent species that must have rather varied biology, surely people would be less uncomfortable with beings that don't fall into our concept of male and female. Or at least, why would all 'droids be thought of as male?
Again, I think that says more about our own current societal biases and comfort zone, where anyone that isn't clearly "marked" as female (with boobs, long hair, or a bow) is assumed to be male, whether it's an
animal character in a kid's cartoon, the "minions" in the
Despicable Me franchise, or a metallic, sexless 'droid in a SF setting.