Why do teens depend to much on thier parents?

Teens are supposed to be in the process of becoming independent, but not yet fully independent. I certainly hope my kids don't feel they are restricting or ruining my life by needing me to care for them until they are fully grown. I chose to have them; it's my responsibility to raise them to adulthood. Adolescence is part of that, not the end of it.

When I was a teenager both I and my friends worked part-time. There is no reason to move out and be completely independent. Teenagers are still kids, and need to focus on things like going to school and developing themselves. Most parents I know want that for their children, rather than having their children move away at a young age without the resources and tools to get better jobs or live happy. If you are under 18 here in the US, you will never find a landlord willing to rent to you and it's impossible to get a loan to purchase a house. Two 17-year-olds I know were recently kicked out of their apartment when the landlord figured out that they were under 18. The reason for this is that anyone underage can't be held liable for any damages/expenses occurred, unlike adults. So really, teenagers are actually forced to be dependent - and as kids, they should be, because they don't have the knowledge to be functioning adults yet.