I guess we make money, when some one else dont. its a zero sum games, our gain is someone elses lose on the other end!! its just how it is.
Good money management and stops well placed (and obeying them!) For me that was much more important than any "edge" I might have
wisely said, some people tend to forget that the best way can be the simplest, simply following basic MM and RM can be a very good key factors in earning in forex.