There always seems to be misunderstanding about this - Vue only does "2 way binding" for local state within the component, and is purely syntactic sugar around you coding a setter/getter yourself. That's all it is.

Any cross-component communication is done with events/mutations/actions, ideally with a central state store.

This offers the perfect mix of readable, understandable, composable, testable state architecture without the constant verbosity of binding everything yourself.