The developer should always raise ethical concerns if they have them, I agree. And those above should listen.

As for the notion that programmers are the reason for all the terrible stuff in the world then perhaps that's kinda true, but only from the most literal sense.

If we look at the evils that have been unleashed on this world by Facebook etc, then from a very literal perspective if no single developer ever pushed a single key on a single keyboard then none of that would have happened. But I'd struggle to say it's solely their fault when there's so many others involved also.