I think you and we should let kids be more independent. Otherwise we will get society, when kids live with their parents and on parents expense till they are 30. Even at 14 the kid is no longer a kid. And with access to the internet, they grown up much faster. Even at school they are taught logical thinking and importance of money. 14 is a good age for kid to start learning to trade, invest. I see nothing bad if kids looses all of his money at that age from bad investment. It is better to do mistake when you are young, learn from that and dont repeat that, than do that mistake at 30.
At first, you were making some convincing points despite the fact that I will not subscribe to your ideas but reading down your comment to emboldened render your whole points questionable. As an adult, how do you feel loosing some part of your wealth to gambling, trading or investments? Bold of you to think that teens can withstand and control their emotions when they loose their money at such age. Where do you expect them to start from? With this particular opinion, don't be surprised when you see underage children engaging in all sort of social vices or even committing suicide because you see nothing wrong loosing money at that age.
Children at the age of 10, 15 to 18 are not suppose to be independent and live by their idea but rather at the guidance of their parents or guardians. If you want to teach them trading at that age then it should be strictly monitored and with demo account. We know technology is advancing and open the eyes of our children already but exposing them to too much internet and money related things at such each corrupt them and cause them more harm than good.