This reminds me religious debates. Folks, there is more than one approach dealing with financial future (investing)! Find what works for you, educate others, if you want to, and don't belittle all other approaches as 'inferior' or 'imprudent'. In fact, 'imprudent' may manifest itself in any of them.
Marathon Investor takes what works and does exactly that - educates others.
We all know that the Earth is not flat. However, how many artificial objects on the Earth take this into account? Yet some good models and objects can make use of the non-flat nature of it. Don't make your beliefs and overconfidence do a disservice to you and others.