Agreed, although I'd modify it a bit:
A SI can trick lots of people (humans have succeeded, surely SI will be better), and the remaining untricked people, even if a healthy 50% of the population, will not be enough to maintain social stability.
The lack of social stability is enough to blow up society. I don't think SI survives either though.
If we argue that SI has a motive and a survival instinct, maybe this fact becomes self-moderating? Like the virus that cannot kill its host quickly?