It isn’t beyond a biblical pale for Jesus to bring forth appearances of saints. It happened at the Transfiguration. What would be beyond the pale would be when what is supposed to be a saint directs so much attention to himself or herself that the Lord is forgotten. That isn’t acting like a saint would act... they ARE cognizant of their audiences aren’t they and don’t just blindly stumble about working apparitions? I think that is what Francis is concerned about.
The only way we know Christ is that he came to us through Mary. One could say Christ as God is too big to routinely be appearing in apparitions though those exist too such as in the Divine Mercy.
Know Jesus, Know Peace.
No Jesus, No Peace.