She also had no choice, as SBF was blaming her. The point being that they still didn't really need her help. It was obvious that he committed fraud, and there was plenty of proof of it.
I mean, the guy was constantly high on nootropics and they had no idea what actual investments FTX made. I'd imagine most of the time was just spent untangling that web, his case was more or less a slam dunk.
As for why it is so short, that's her reward for helping them get SBF.