RBD does not discard through 4DC; what it does do is stop the draw, because the cards are revealed instead of drawn. So the net effect of using 4DC with RBD up is that the cards are revealed, LSs go to play, and the rest are topdecked.
Self Control is different, because it protects the cards from being revealed or discarded. Hence, cards are drawn as normal.
The instead portion of The Entrapping Pharisee targets a card in hand for discard, so if the hand is protected (such as by Self Control) then that option cannot be taken.