You sir, are ignorant. Not all parents can afford to buy $20,000 cars for their kids. $2,000 is a lot of money for some parents to fork up. I have plenty of friends who would be super grateful if their parents bought them a $2,000 car.
Also, teens are highly more likely to speed and shit, and a $2,000 car wouldn't allow a kid to go half as fast as a 20,000 one and is probably safer in my opinion. (Assuming its an old corolla or something)