I don’t think he believed himself to be a master of everything but I get the clear impression he was leaning into an eastern/Indian spiritual tradition and like

I don’t think he believed himself to be a master of everything but I get the clear impression he was leaning into an eastern/Indian spiritual tradition and likely even believed himself to be spiritually enlightened or on the cusp of enlightenment. So he thought he could heal himself, and possibly didn’t mind dying. After all, his last words were “Oh wow! Oh wow! Oh wow!”