More likely that none win their GT.This forum will explode if G wins the Giro, Bernal wins the Tour and Froome wins the Vuelta.
I don't understand Ineos's reasoning here. Carapaz looks more likely to win the Giro than Thomas at this point, so it seems Ineos is gambling that Carapaz will make the difference between Bernal's winning the Tour and not. Maybe exclusively as a dom, maybe as another card to play, maybe as a backup if Bernal falters. Gambling away a Giro win, IMO, just to improve their chances of a Tour win.
If the team really thought Thomas and Froome were good enough to win another GT, why in the world wouldn't they want their support in the Tour, extra cards to play, backup for Bernal's back? Either one could go on to the other GTs, anyway, if all they did in the Tour was dom duty.