I think there are several factors,
@ralzod.
One is that driving for most people becomes so routine and automatic and boring that their attention is diverted from the task at hand. It's too easy to be talking on the cell phone, texting, messing with the navigation system, eating a sandwich, or playing with the radio and forget what you're doing. People drive thousands of incident-free miles and forget the potential danger of inattention.
Another is the proliferation of media toys in these newer cars. Driving a UV ("sport" my a$$...there is nothing sporty about a UV) is boring, so you play with stuff on the dash. People are more into the alternate attention grabbing stuff and I think the accident rates are rising as a result. It's difficult to separate the effect of media toys from increasing traffic, but I think the trend is clear.
Finally, most people (present forum members excepted) are passengers behind the wheel, not drivers. I learned to drive in high school, which courses have now been all but eliminated in most schools. I spent a day at the Bondurant High Performance Driving School in Arizona when I was stationed at Ft. Ord waaaay back in the late '60's and I've had pursuit driving training as a deputy sheriff a few years back. I love driving which is why I don't buy Yugos, and even on long trips I seldom listen to the radio when I'm alone and the wife is not in the car.
I care about my cars. Defensive driving is a full time skill - sort of like playing a video game where everyone else is out to get you. I never cross a blind intersection unless I know I can stop before being T-boned, I never trust a weaving driver or a slow driver, I always know what's half a mile ahead and 1/4 mile behind and overtaking me. And yes, I push the speed limit and push corners. I don't drive aggressively, I drive opportunistically which means you have to think ahead and plan. Avoiding accidents also helps a bunch on insurance when you've been with one company for decades with no claims. Like the Steven Taylor Super Bowl video (posted elsewhere), driving keeps me young.