I agree, but this set in during the carbon freezing scene in Empire. 3PO suddenly becomes the voice that tells the idiots in the audience what’s going on and that trait follows him to Jedi.
It’s plot exposition. It has to go somewhere.
IMHO his exposition in ESB is forgivable as the audience is obviously completely unfamiliar with the potential outcomes of carbon freezing a human being. Having Threepio inform the audience is beneficial, and the way it was written was handled quite deftly.
But Vader, Fett and Lando already tell us everything we need to know there. The dangers and the outcome. The exposition was handled very well until 3PO starts talking. Then it’s info dump for those who can’t pay attention.
It’s always sounded ham fisted/shoehorned to me. Just like his many moments in Jedi.