There's a simpler explanation. He is doing this for profit. I don't buy all the speculation that he approached the SEC out of some professional obligation or simply to spite the Twitter leadership. As a former executive he most likely still holds stock and having the price plunge is not exactly in his interest unless the pay-off from whistleblowing is high enough. Given his high profile, he just burned all bridges career-wise at big tech. The expected whistleblower payout here must be enormous.