I've been practicing it and it seems to work well.
It seems that I can explain this in terms of nash equilibrium. I tend to see it that all of us are already physically able to achieve much and paying attention to some topic will subconsciously allow us to manifest what we want.
Buddhism teaches that there are laws that govern human nature. There are laws of living objects. There are laws of karma.
Is the law of attraction one such law?
By the way, I tend to see Buddhism as a way to understand life instead of as a religion. I am not Buddhist but I see that there is some truth in what Buddha taught. So that's my background.