live load vs dead load

What is the gi (judo jacket+pants or kurtka for us Sambists) actually for? It's too heavy to be a day to day outfit, especially a proper one like the Mizunos I have or if you've ever randori'd vs a dude wearing a freaking Moskito then you really know what trashed fingertips is all about. The traditional kimono is generally a lighter material (at least insofar as its preserved these days).... I think there is a hidden in plain sight aspect to the gi. The jacket grip allows a delay in the pulling that mimics the elastic action of a relaxed/working tension body transmitting power. Power being roughly defined here as from the hips down to the legs and back up to the hands. In essence, power is sourced from the ground. The jacket can be used as grip-confirmation, generally for a more muscular throw, or as a way to connect to uke while maintaining connection within yourself. Properly utilized, the jacket grips can create space to counter-move then move or for outright hara2hara connection-hence control. I hope that one (magical) day I could train with Katanishi Sensei. But in the meantime, his mastery and insight is amazing and I only have seen what videos are on internet and a few DVDs I have. This is an old video, he's gotten even better at explaining and defining Judo as a whole-body engagement and I don't hardly speak French! Notice the whip or elastic chain of movement or whatever the hell you want to call it, it's awesome: Something about this delay action gives a sense of hara (center) to hara connection. I'm still mucking thru it, ruminating on exactly why...One thing that I've noticed is that one can attack uke and break his posture and then from that point on: it's as if he's a dead-load so that a clean/snatch sort of power chain will finish the throw versus having a connection in yourself which you tie into them and throw them as a live load: a more reactive, preemptive, hara to hara control. A dead load in engineering is just that: the non-changing, permanent materials that compose the structure. A live load is trickier: it's all those fatass tourists on that bridge over the koi pond and if they all simultaneously lean over to the right for a photo will the bridge hold? Will the bridge inter-accomodate? Can the body be trained for a shifting, dynamic, elastic load? If so what is the best approach? this is the tip of the iceberg, the first tentacle breaking the surface to be followed by the rest of the mighty Cthulhu... http://www.summeroflovecraft.com/images/Cthulhu-4.jpg