I wasn't suggesting that there aren't ethical dilemmas, just explaining the processes how I think usually things like this work in bigger companies. Some low-skilled worker can do the ethically questionable thing. The skilled engineers just solve some cooler problems generally and provide tools to those who deal with the ethically questionable work. And I am pretty sure that most people, even talented engineers don't often think about that too much. They just want to solve cool problems.

It is quite obvious that someone with not so much skills is more willing to do unethical work than someone with higher skills and demand for those skills.