You may not be making employment decisions based on the number of people you help, but projecting into other people that other don't either doesn't actually absolve you of the hurt you cause others. It may help you sleep at night but you're lying to yourself if you really believe that. Most jobs lie somewhere in the spectrum between school teacher vs murderer for hire/military and you have to determine where any given job sits along that spectrum, and where in that spectrum you're comfortable sitting. That the job's value to humanity is coming up means you understand it's questionable. DeFi circumvents money laundering laws, almost by design (if not by design, running proper KYC is simply extra expense that a businesses don't want to pay for), so the work literally helps fund terrorism (eg Iran, North Korea). You can disagree with the US government's stance on the matter, but don't pretend that enabling those regimes is the same as implementing ad tech at a FANG.