Your title is a little miss-leading. I think it should be "Getting really drunk really quickly isn't cool."
Anyways, the thing about having 7-15 drinks over the course of a night is that for the first atleast 3-5 drinks you're not drunk yet and if you are drunk you will not be as drunk as after you drink the rest. My point is Binge drinking when performed to the right extent gets you drunk at the beggining of the night so you can enjoy the entire length of the night being drunk the whole time. Instead of being sober, then getting more drunk and more drunk as the night goes on.
Personally I drink a lot at the beggining of the night, usually vodka, then I maintain my drunken state by having a few beers for the rest of the night.
But yeah if you have too much then you can take when Binge drinking you're gunna have a shit night and an even shittier morning.
And remember kids...
Beer before liquer you're gunna get sicker,
Liquer before beer, you're in the clear.
Learn it, know it, live it