In the grand scheme of things you’ll realize sex is not a big deal. Not sure how old you are but I’d guess 20’s. Give it another 15 and you’ll realize what’s truly important. Meaningful relationships.
You're actively encouraging teens to have sex. And reading your replies it's implied that you want them to have unprotected sex to procreate to produce more kids. That's weird and creepy.
I'm willing to bet that there are millions of teen parents who would have a different view of this. The problem is that teens often don't have access to birth control, or are manipulated, or plain stupid because their brains haven't finished developing yet.
I'm sure that some people would have regrets about not getting laid as teens. But it's hardly a hard and fast rule.