I think making a statement as an industry helps avoid some of this stuff even being asked. With research you can easily find doctors who are brought in to assist with torture or other heinous crimes, but in general I would expect it to be harder to find a doctor to help with my project of creating a more addictive cigarette versus finding a web developer to help me market them.

There's some (not a lot, but some) power in a profession just claiming to have ethics, even if there is no enforcement and change in the hearts of practitioners.

Plus, at some point, we all just have to own what we do with our lives. It's great to advocate for systemic change but doing your own small part is at least as important.