Don't kid yourself, poker is very popular game with millions of people playing everyday. If you think you can beat most of them the go ahead, try to be pro poker player. I know I can't.
I don't agree with his statement either. 9% sounds way way too high considering the amount of millions of poker players around the world. Maybe its less than 1% or 0.1%
actually the number as I have heard is really close to 10% when we are talking about profitable players
but these profitable players may not be living from poker . maybe they are making 200$ a month in this case they are good and they are profitable but they are not living from it