Because I'm going to tell you something you won't hear from most traders:
"Professionalism doesn't mean you don't lose... it means you aren't surprised when you do lose."
Professionals aren't magicians... they are people who have built a system that allows them to endure losses without their lives falling apart:
They distribute risks like someone building a dam.
They treat loss as a necessary bill.
They know that a black day will come... so they store hope like food in winter.