It's true that 2-3% frequent gains add up in the long run.. The real enemy here is our greed and we should learn to be systematic instead of letting our emotions make the decisions for us.
It is so hard to work or trade without losses so in trading it is important the analyzation. Also dont be impulsive in buying and selling and ofcourse youre saying the greed is should be controlled. Once we surpassed this it will contributes to become successful in trading.