Webexplorer - While I gracefully understood what your point is about having children at a early age in order to bond with them for years to come, so and on.
In a way, It is nice to be able to have all of the time to yourself to share with your children but, on the other hand, it also means you have to make a huge sacrifice. Once a child comes in your life, you will no longer be "free" to do whatever you want to do or be able to please yourself at any time. That moment will come to you sparingly when you become a parent. A child will turn your world upside down -- not that it is a bad thing because, it is wonderful to have a child -- but I am saying that, when you do have one, it also means you will have to go to every length to accommodate their needs in every sense.
That is also why, I gracefully disagree with your perspective because it does not matter how old you are to have a child, a love for a child beats the age at any time. However, like everyone says, it comes with huge responsibility and much beyond that. Would a teenager be ready for that? No. Teenagers are in their golden years of 'discovering' theirselves. When a teenager has a child, they are 'forced' to grow up a lot faster without being able to understand theirselves at the same time.
Teens are in their phase years of experimenting everything they can get their hands on. What they don't realize is, sometime a wrong experiment concludes a hefty price.
