So you wish you didn't have the ability to drive right now?
I don't think it has anything to do with age. I have seen stupid teenagers, adults, etc. Fuck...I will take a dumbass trying to race me over a stupid bitch on her cell phone, putting on lipstick, and changing the station any day. They are usually 40 years old too. Limiting the age won't solve shit. Making a harder test won't solve shit either. Knowing what a sign looks like doesn't make you a better driver. Knowing the rules of the road cannot teach instinct and common sense.
If you raise the age, all you will do is delay the dumbasses from doing dumb things. They will still do them, eventually.
How much do you want to bet the dumbass that drifted and hit a pole the other night was older than me? I would put my money on it.