My impression is that Bourdain obviously fancies himself a "real chef" and wears...
...his scars like badges of honor. Anyone who hasn't experienced HIS brand of "suffering" isn't worth their salt, or deserving of fame, fortune and felicity.
As part of his attempt to "stay relevant" he has appointed himself Judge, Jury and Executioner over anyone who dares enter the arena where he holds court. In other words, he's brash and opinionated, and he gets paid handsomely for it.
Such is life...
Michael