I'd argue that the various caricature worlds were extremely far removed from any realistic trajectory and served as little more than a heavy handed way in which to undo the nuance and consequences of Shadowbringers.

'Venat had no choice' is suggesting that genocide is alright. That sometimes there's a good reason to partake of genocide. By that logic, the Rejoinings are entirely acceptable - except the story doesn't pretend that they are. Funny, that.