Beware the offhand remark -- it is the serious point that one feels no need to defend. It is a window into a subterranean world of pressure to conform to the belief system that assigns truth and value to what is being offhandedly said.
Beware one who makes a serious point/argument wrapped up in jokey talk. If you challenge his point he will try to shame you for being humorless.
Beware the national leader who attempts to charm you out of your desire for specifics on a topic of national interest.