I'm guessing this just comes down to Bungie's bad/lazy writing again, or teams not paying attention to what the others are doing, but it just seems odd to me that the Witness needed the Traveler to open the portal to wherever...but was going to let Eramis attempt to destroy the Traveler in Season of the Seraph? Now personally I don't think the warsats would have even scratched the space magic golf ball, as we already know Rasputin was completely useless against Paracausal forces, but it just seems funny to me that Witness would knowingly allow her to try to destroy the thing needed for its plan. So was he just stringing Eramis along or trolling her for her failures on Europa?