He's arrogant, that's why he does what he does. The first day he showed up on FR, he puked out a mile of BS about how it was stupid and paranoid to begin antibiotic treatment of inhalation anthrax before the symptoms appeared. If he was a real doctor, he should have known -- as virtually everyone else knows -- that if you wait until symptoms appear, you have effectively sentenced yourself to death.
I haven't quite figured the guy out, but I do think it boils down to a question of either knowledge, or motives.
Or rampant ego. :o)