What? Scarpozzi, you have no idea what you are talking about. How about we try a couple of real reasons...
1. If you don't stay over the middle of the ski, there isn't much behind you. You get in the backseat, and you're in big trouble. Slalom skis used to be a lot longer behind the ski boot. If you leaned back, you had something to push against. Now you just fall on your ass.
2. The other big problem is that the skis have a ton of sidecut. They used to be a lot straighter (the tip/waist/tail measurements were a lot closer). This lets you use a shorter ski, but it makes the ski a lot more grabby.
Basically, you can go faster on the new skis, but you have less margin for error.