i think it comes down to one thing - majority of players don't know how to apply what they've learned/read (incorporate it into their gameplan... that is, if they even have one in the first place).

they either overdo it or underdo it. or, they apply what they've learned/read at the wrong time. the trick is not following what you've read/learned to the letter... BUT understanding *WHY* the book told you to do a certain thing in a certain situation. you have to understand the *IDEA* (the reasoning) behind it and not just blindly do what a book tells you to do.