Not sure what to think of that. He should hire an editor. Most people would not respond positively to that letter so his whole philosophy is meaningless.
Though I can sympathize with trying to avoid distractions and delays with simple problems. Micro-managing horrors.
And I also hate excuses. As someone who is on the verge of failing, I absolutely loved the Hannibal quote. Do anything to succeed mentality is good if applied to being self-critical. I believe that increasing work ethic, knowledge and skills with overall hardcore discipline is the only thing I have to logically and spiritually continue to use to fight the constant failure I've experienced.
In other words, as I was often told growing up "don't be sorry, be correct". Stop making excuses and do it. There's some chance, some method, some concerted effort that will yield an eventual probability of actual success which is only achieved by being self-critical and then improving.
EDIT - I didn't write this very well. Valid excuses are actually very good and effective. Logical reasons why something can't be done lead to ways it can. I've worked with too many people who avoid "negativity" out of some law of attraction thing. So I like when people say, "I'm stupid, your stupid, we're all being stupid but we can and should be smarter by doing X, Y and Z".