It's easy to see that #SBF was wrong _in hindsight_.
But imagine he had managed to keep the ball rolling a few years/decades, producing billions for good causes in the meantime and promoting #EffectiveAltruism at the higher level. And that #FTX vanished little by little without much attention — yet another #crypto promise failing.
The main “victims” would have been a bunch of wealthy celebrities and investors (and yes, also tens of thousands of small customers; mostly relatively rich human beings living in wealthy countries). I can see how the positive impact could outweigh all those losses.
I'm not saying he did the right thing. (For one, we don't know yet what he did, exactly. Of course, if rumours of funds being siphoned out of #FTX turn out to be true, and SBF and his circle are behind that, the guy is a monster.) I'm just saying we all face analogous (if also much lower-stake) trade-offs routinely, and we make decisions estimating odds and computing expected value (perhaps unconsciously) all the time.