It's an interesting stat, but the chart doesn't speak as to the levels of experience of the traders. All beginners lose money, but it's entirely possible for an amateur to become a profitable day trader with time.

Speaking from experience, the real issue for me was that once I started to get good at it (after 2 years) I realised just how awfully boring it was. It's not intellectually demanding and for the investment of your time, stress and the risk involved, the rewards even if you reach profitability aren't worth it.

Now that I can reflect on it, I couldn't be happier that I stuck with software development instead.