It is easy to tell yourself, "I have a good risk management system and it will be profitable in the long run." However, it is much harder to make it happen. It takes serious will power and self-control to utilize a good risk management system. Every trade needs to be made according to your own rules. If it is not the right time or setting for a specific trade, you have to be able to walk away. At the same time, when you ride on high profits, you need to be able to stick to the same rules as well. In between, when you get bored, you have to abide by the same rules.
Risk management is important for a variety of reasons, but there is one very important reason: you have to be able to manage risk or you will get cornered financially. If you get cornered, you can't trade; and when you can't trade, your account will not grow. It is very difficult to stick to good risk management techniques, but remember that it is better to be able to make a small trade than no trade at all.