The author makes some significant arguments on the con side of the pros and cons of single payer, which are part of the information to consider when comparing the pros and cons of single payer with the pros and cons of the health insurance model.  The conclusions the author draws from this information are absurdly broad and are not obviously the only or necessarily even a reasonable answer to the question of comparing the two systems.  He has simply cherry-picked only information that seems to support (quite marginally in many cases) the conclusion he is wanting to draw.