Those numbers are probably based on short-term traders stats and not mid/long-term traders/investors.

Because I know a good number of people that usually look for a project with a decent or above fundamental and instead of trying to trade it they will just buy and hold it for a while and it's more like an investment to them and most of the time it works for them too in the long-term and almost all of them are in positive profit.

That's the issue with short-term trades, you just usually buy whatever suggested or shilled somewhere without having any information on them and after a while if they go down you just get impatient and sell in a loss and you do the same thing with the next one until you just get lucky and buy something that will go up after you bought it thinking you're getting good at it or you're improving, not knowing at that point it's just pure luck and it's not good sustainable strategy in the long run and it will fail you miserably down the road.