Well, he would say that, wouldn't he ?

The actual reason:

The BBC will stay on X because it has been caught being appallingly left-wing and now has to pretend to be more centrist until the fuss dies down and they can be trendy-lefty student politicians again.

True title: Tim Davie says BBC will stay on X to try to stem ‘flood’ of global misinformation

This is not how it works. Leave X and if someone asks why you’re not there tell them it’s because all of the disinformation.