The reason trading is so difficult is that you cannot lie, hide, or rationalize failure.
Reality is what it is.
In most, if not all other profession's failure can be rationalized.
A lawyer might say he had no case, a doctor might say he did all he could it was "in the hands of God", but in both cases they get paid.
However at the end of a trader's report period, be it a day, a month, or a year he will either show plus or minus capital.
There are no excuses, traders don't get paid for failure.
"The symbol of all relationships among (rational) men, the moral symbol of respect for human beings, is the trader. We, who live by values, not by loot, are traders, both in matter and in spirit. A trader is a man who earns what he gets and does not give or take the undeserved. A trader does not ask to be paid for his failures, nor does he ask to be loved for his flaws."
Ayn Rand, The Ayn Rand Lexicon