And for your second question jwst's near infrared and infrared spectrum allows it to see through gaz clouds and wayyyyy further in Space and Time than hubbles who's some kind of a giga dope camera, showing you basicaly what your eye would see through a lens as good as his.

Si it's not (only) a matter of communication because we only Saw the outside of, say, thé pillars of création. JW allows us to see it from the inside out !