I absolutely agree with this.
It starts with an analysis of what the market actually IS. At its lowest level, above the hardware, communications lines, etc, it is simply people (and algo's) deciding to bid or ask at a price and volume, and above that a matching of those bid/asks by the exchange to result in a trade. SO MANY people try to read more into it than that ... it starts with assuming that trades have to move up and down in some kind of orderly way, that they have to take small steps, can't gap, etc ... and it ends in complete delusions like thinking that the money you spent to get into the market is "there", meaning that it is sitting in some account somewhere waiting for your to decide to withdraw it, when in reality you are holding stock and someone else has long since walked off with your money. Except that someone is willing to bid for your stock right this moment, there's no assurance you'll ever get a dime back from it.
The only thing close to a "sure thing" is small time frames that are doing the same perceptible repeating patterns so many times that it's a statistically likely event that B is going to follow A and you're going to make money. It's the difference between trying to (1) figure out by watching a person where they're going to go this afternoon based on nothing but where they are at, and (2) trying to figure out whether their right foot is going to hit the ground when they've been walking forward, are standing on the left foot, their right foot is in the air, they are leaning forward at 10% degrees beyond perpendicular, and if they don't put their right food down gravity is going to cause them to face plant on the concrete. I have no idea where they are going to walk to, if they want to get a haircut, if they intend to get some pizza or a coffee, or if they are part of a Mars mission and are about to get suited up to enter a spaceship ... but with statistics, careful observation, testing, etc, I believe we can figure out whether their right foot is going to hit the ground or not with a good amount of certainty. Those are the bets I like.