Cause most are into trading to get rich quick they don't care have the knowledge of trading before diving into it .Trading takes a lot of time for one to become a professional .one need to learn a lot ,Practice well and advisedly start with a small account before moving to a larger one .This is one of the most simplest way to become a professional and profitable trader.
Even not small account. A demo account would be enough. But most are not willing to submit to the process. Because why would you go to screen to play with paper money and learn price action first right? Why do that when they can just simply put a random trade, pray over it to win. Most grow into that unbeknownst to that what they are doing is gambling is not trading. In trading there must be a repeatable system in play.