It is likely then that you are more of either an auditory- or visual-minded person. It's fairly straightforward to tell: do you learn better by reading, listening to someone lecture, or touching the thing you're learning about?
Anyway, we can probably just disagree on this, but I believe rumble is less about adding realism and more about a subtle but necessary feedback. I recently played FEAR on the PC, and it's been awhile since I haven't had a rumble feedback while shooting. I honestly really struggled with lacking that feedback; it was as if one of my senses were blinded (which indeed they were).