"I find this complaint to be valid at certain points, but nonetheless stereotypical. It's as if they think we're all mindless idiots. Unfortunately I have heard older people say this, and unfortunately this is how typical teenager would respond:
"You're wrong, man! Love conquers all and we know how to solve all of our problems. I know for a fact that when I grow up I'll be a (insert unrealistic job occupation here). So don't judge our love, man. But you're right, I don't care about family or tradition or any of that. I only need love."
Well. At least the students aren't too shy to share their opinions. :)