It'd be interesting to compare the amount of young drivers killed in say the 70s and 80s compared to today. Fatalities overall have fallen considerably in the last couple of decades, so have inexperienced drivers actually got worse...
I dont know what the answer is re young drivers attitudes, i'm not sure much has changed in 30 years.
I started driving at 17 in the mid 70s. I drove (to be frank) like a fkin idiot, foot to the floor, like every trip was a race. Plenty of my mates did as well.
Why ?...i cant answer that, i always was and still am, sensible and decent in every other way. I dont drive fast anymore, but i do everything else hell for leather (not literally, but i do most things fast)..perhaps thats why, i ride my bike like its a race, i NEVER ride slow, if i try, i realise five minutes later, i'm pushing along again. I work fast, i walk fast, i seem to have this mentality to get things done efficiently and quickly. I think of myself as a fast burner...perhaps thats all it is that makes people drive fast.
Then, compare cars from my era to today...60mph was about it for us in our clapped out minis and anglias...while today, even a Corsa or similar is capable of 100mph, 80 mph easily. I made this point in another discussion a few weeks ago about cars...most cars are capable of doing 80mph, comfortably. Now try emergency stopping at 80 mph or steering quickly...you've got little chance of doing it safely in most standard cars, you'll be all over the place.
So, is it teenagers have got worse, or is it partly (or even mostly) that cars are even more capable of high speeds, but are useless when it comes to high speed cornering or braking. Even my 57 plate Focus, nice and agile around town, is pretty soft when cornering at any moderately high speed, the front end burys itself and understeers. Bloody useless.