Pivot has some big implications in this discussion too . . . keep in mind the right forearm has to be DRIVEN . . . so with hitting this is pretty much self-explanatory . . . how does it get driven? . . . it does it itself! But in swinging . . . the pivot does the driving . . . if the pivot stalls or does something whacky to pull the hands of the intended plane . . then the right forearm alignments have a good chance of being compromised . . . inturn potentially compromising hinge motion and plane angle.
Take a look at Phil's face vs. Furyk's face . . . HUGE differences.