Bcoz in intraday, a trader try to play for small target multiple times.....if my target is 2000, i can earn in 2-4 trades and close my shop....but if target is high, i will try to play more and in that, i will eventually lose what all i have earned in my past trades.....here i'm not talking about failure of any system or indicator....also, i'm not saying that i know any holy grail to earn those 2000 .....here i'm talking about discipline and money management which is very difficult to maintain specially during intraday.....