Who says no one raised an objection or said something? Even on mundane decisions unrelated to ethics, I've seen engineers object to things and get overruled. I

Who says no one raised an objection or said something? Even on mundane decisions unrelated to ethics, I've seen engineers object to things and get overruled. If you continue digging in your heels, the leadership will simply fire you or move you to another team and get someone else to do it. If you did have strong ethical objections, it's likely you just left the company. Why stay at something where no one else shares your ethics? So the moral vacuum is somewhat self-reinforcing. Besides all that, it's a lot easier to sit in a place of judgment when you weren't involved than, say, in a position where you needed the job to put food on the table for your family.