Fear and past experiences can be really crippling and damaging, to some people. -- It kind of just locks them in place, and time ,
When I suffered a 40% account loss when I first began and jumped into trading head first in 2008/09...I studied and paper traded in my mind, and just sat on the market sidelines...for the longest time. Just couldn't seem to get myself to jump back into the market.
Kind of like dating and relationships. Initially, you're so carefree and happy and excited and innocent...but as you experience rejection or ageing...you can get really defense and apprehensive to experience that again.