>> If day trading is not profitable, then why do people still do day trading?
They are trying to become one of those 3% of people (as what the article is saying) that are making profit in day trading. In reality, more people are really losing money than earning, based on a lot on studies no matter what type of trading it is. That's why a newbie trader shouldn't risk 100% of capital he can, as much as possible make it decent just for the sake of learning and experience.