I know, but if you have Jace Beleren and JTMS in hand, you have to choose how to sequence. You interact with your own side of the board still, even if not with your opponent's.
Is that really that "feel bad"? I remember playing Standard with baby Jace and big Jace and it presented interesting sequencing decisions. I think the "feel bad" of having a PW in hand is much less than the "feel bad" of facing two PWs on the other side of the board.