Two primary issues: survivorship bias and (again) mistaking correlation for causation. (Btw, I’ve read both books – they’re not bad books, just not to be taken too seriously – some of the conclusions drawn are overly simplistic.)
Unfortunately, this is complicated and I don’t have the time or patience to type it all out.
Read Taleb’s book and then you’ll understand. Trust me. It’s a great book regardless of how you feel about his damning critique of the other two books, their methodologies and conclusions. Taleb’s forgotten more about investing and statistical research in the last 30 seconds than Kiyosaki, Stanley, etc. know cumulatively.
I guarantee you that there are quite a few things that “appear” to make sense to you when in fact they do not make any sense at all when put under the microscope of more rigorous logical analysis. That’s human nature.