Experience will go a long way when it comes to trading, but experience alone will not help you become a successful trader. Of course, you need more in order to succeed. 
If newbies start in a risky way like using all capital for trading, and losing it all after first couple of months, the journey will be very short and painful.But if he would use only the money he is willing to spend - it would be goo enough to start the journey to become a trader in the first place.
After all, theory is nothing without a bit of knowledge and eventually, practice.