"Getting it" or "Not getting it" is irrelevant ... in my opinion (also irrelevant).
It boils down to personal tastes, "tip-up", "tip down", whatever floats your boat. Moving your hand up and down the cork, that is up to the operator.
I like a butt heavy rod (tip up) for hitching, skating and dead floating a dry fly ... I move my hand up the cork.
For sunk fly presentations using full sinkers, I like a "tip heavy" rod (tip down) ... I move my hand down the cork.
I don't want to get into the "why's" in this thread, I will just say it's the way I like to swing for those presentations. I use the same reels for both presentations (I love my Olson reels). So I do what I do to make me happy
Wonderful thing about our sport/passion, is we can concentrate on many aspects of it and break it down to a science ... and that is what fuels the passion for some ... others not so much, it's something else. It could be line building, fly tying, hook making, rod building, whatever it is, it is personal and makes them happy. I have a friend on here that has broken down balancing his rods and reels down to 1/4 oz. He likes precision and that defines his personality ... awesome. I still think he's crazy, but I remind myself, that's who my friend is