I mean, I would expect anyone in his situation to try to defend themselves, assuming that the allegations were false - or even just as a way of limiting the damage.
He could have easily made a statement saying it was all consensual, which, given the sexts etc from some of the women, would probably have been enough to throw enough confusion and shame into the mix that everything went away.
I think he thought he was being clever by saying nothing and now it's going to be pretty hard to come back from any of this. I'm sure people advised him it was a terrible strategy, but he's a narcissist cult leader, no one can tell him anything.