Holding CEOs accountable or even firing them, would provide a powerful incentive to not do this.

And more to the point, "I was following incentives" is no different from "I was following orders." It doesn't become suddenly okay to do harm just because there's an incentive to do harm.

Hacker News and corporate culture in general are toxic because of people blaming market conditions instead of taking responsibility for their own actions.

You're literally just saying we can't disincentivize sociopathic behavior, because those behaving sociopathically are just following incentives.