Not doing your due dilligence during recruitment is stupid, but exploiting that is still unethical, unless you can make a case for all of those companies being evil.
Like if he directly scammed idk just OpenAI, Palantir, and Amazon then sure, he can't possibly use that money for any worse purposes.
This, coming from LW, just has to be satire. There's no way to be this self-unaware and still remember to eat regularly.