And 50% of the world cobalt production comes from DR Congo, a country that hasn't been stable since the 1990s. A lot of that cobalt money ends up in the hands of international mining companies doing dodgy deals with corrupt top government officials.
Group effects are known, cf bystander effect. Actually companies show a bystander-like effect, "what we're doing here is evil, someone [else] should change that".
Just because such behaviours are common in groups doesn't mean individuals aren't responsible. It's easier to ignore your moral responsibilities by invoking the company as the responsible party.
Corporate culture as in, we want you to be a {insert company name here} person. And the corporation is set up to make that happen.
You're discounting having the ability to mold someone for a decade+, which is not an insignificant effect on their behavior.