Very few people are "bad" people but the way you're describing it makes it pretty clear that they're making unethical choices, and they're doing so consciously. Actions speak louder than words.
The choices aren't like those in a DoD company (we assume from the poster this is a FAANG company). You aren't actually building weapons platforms. It's a bit more like slot machine engineers here; people's lives are 'worse', but not 'over'.
As such, I think it's very personal.
If they are OK with building digital casino-like places, so be it. If they are not, then they should make a plan to leave. If they feel that the money is the only thing keeping them there, they have to look into their own mirrors.
all of these are concepts in the mind.
in truth, it is all simple ignorance and a case of mistaken identity.
there is no bad... good... no ethics... no this or that.
this is how the world will be until we all wake up.
until then, we rest in compassion.
"Doublethink is a process of indoctrination whereby the subject is expected to accept as true that which is clearly false, or to simultaneously accept two mutually contradictory beliefs as correct, often in contravention to one's own memories or sense of reality." [1]
What do you call it when one doublethinker absolves a different doublethinker for doublethinking? Doubleplus-doublethink?
This is where government regulation is needed.
There are bright people making lots of money in other industries who would struggle to even pretend they are making the world a better place.
In fact, how many jobs are there where you can get reasonably high pay and status, and still feel like you are actually improving the world? Medicine springs to mind, the sustainable energy industry...some parts of the software industry...anything else?
Sadly it seems most of us need to sell at least a little bit of our soul to pay the rent.
Finance, oil, corporate attorneys, lobbyists -- I can't think of a single profession that doesn't build a myth around their value to the world.