Congrats on finally being old enough.
Sorry to burst your persecution bubble, but I knew how to drive at 14andcouldn't get my license until 16. I enjoyed porn at 16, but couldn't even go into the adult store until I was 18. I knew how to drink and gamble responsiblyat 18 but couldn't do it legally until I was 21. I drive better than 90% of the morons on the road now, but I'm still waiting to turn 25 so I can rent a car.
For every responsible, mature person out there there's 1,000 idiots. That's why the laws are the way they are. Stop whining about the laws and do something to change the proliferation of idiots in this country.