stop loss vs stop profit

if we have the habit of not having Stop Losses (SL), why do we  have habit of taking Stop Profits (SP)....we should be indisciplined both sides...

that's one of the key reasons why even traders with 50% success rate end up losing 90% money

unfortunately, fear works both side....instead of fear on the loss side, and greed on the long side....

ironically, traders have fear on profit side and greed on loss side...

trading is 90% psychology and risk control

risk control = the warrior who knows he can't die can fight much better and win more frequently....self talk