I BIAB also, and have never conditioned my grain, no problems so far. I think ( like it seems you do also ) that it is better for keeping the hulls intact, and providing a better grain bed for sparging. I also crush the crap outa my grain. Not to the point of shredding the hulls, but finer than I think most "spargers" would.
There may be some people that think it helps reduce potential tannin issues, but I'm not sure that is true. They used to say "NEVER squeeze the bag", and I think that has been widely debunked also.
Screw it, Lets brew it
Primary 1- BM's Cream of three crops.
Primary 2- Paleface Scalper
Primary 3- Monks Reward (Kreuzberg)
Kegged - Honey Badger, Heady topper clone 1, Indian Paleface Scalper
Bottled- Skeptical Dog winter Lager, Hell's Belgian, Old Dutch Hiefer Hefe,Aphlewein, Chocolate Thunder porter, Jacked up lantern