I would say that it is probably because a large portion of the mainstream media/ general population thinks bitcoin is for complete loonies. If Gavin's tone wer

I would say that it is probably because a large portion of the mainstream media/ general population thinks bitcoin is for complete loonies. If Gavin's tone were confrontational, it would likely make people think he's getting defensive over his obviously ridiculous magic internet money. He has to err on the side of caution to avoid people making that assumption.