If they would allow children to drive a car, people without drivers licence to drive a car, blind people to drive a car...
The failure rate with be so high too.
If you have 500$ and a pc you can start to "trade". Nobody is ever tested to see if he is able to trade and if he has even any clue what he is doing. Most people overestimate their own qualities.
The average joe is not qualified to trade.
In the mid 90's I was trading my own forex account at Prudential Bache. They asked me to trade accounts from their clients too. These clients lost so quickly their money that PB had all the time to try to catch new clients to replace those who went broke. It was better for them to let me trade these accounts as at least they stayed alive.
The failure rate doesn't matter. Try to find out if you can survive, because that's the only way to make money. The failure rate, high or low, will never bring you money. Your qualification does.