I watched a guy I know, that can bent just over 500 raw and natural, get his brand new bench shirt in. When they finally got this thing on him, he got under the bar and the shirt was so new it wouldn't stretch enough to even let the weight touch his chest and that was with over 500lbs. Lol. You can't tell me those shirt don't help your lift by at least 20% and more.
It's obvious the benefits bench shirts give, but do you honestly think these athletes don't realize the boost they get from them? Of course they do. Most, if not all, don't deny it. It's the nature of the sport, not the individual. If you're competing in powerlifting (in equipped meets) then that's the measures you have to go to. Unfortunately for the sport, the biggest success (in any terms really) comes from those federations and meets which promote equipped meets. Don't hate on the individuals, they're just abiding by the rules within that set competition. Granted, my view of powerlifting in general isn't the most positive one either, but the thing is it still takes time, training, and strength still to put up a 800lbs bench (even if the guy is only doing a raw 500 or whatever).