I agree as well.

Nobody will do it with real money because:
- it is very risky;
- it depends on the market condition;
- trading on demo account and trading with real money are very different psychologically;
- it is necessary to know the threory and to have good trading technique;
- MM;
- every trader is having his own trading system. It is impossible to create the system for everybody. Because we all are different and having the different characters, habits and so on. Each trader is adapting the system to himself.
- every broker (or "big fish") will make money protecting himself from such "a successful trader".
- trading system is not human being. It is some indicators all together. Trading system is not doing anything. Man is trading. And sometimes his trading skills depend on his feeling in the morning (my skills for example).

And it is useless on demo account as well.
Ask trader who did 100% in 3 days to repeat it many times on demo account: trader may repeat it 2 or 3 times but one very small mistake may be enough to lose whole deposit.

There are normal trading technique and risky trading technique.
It depends on how to trade.