By definition, actors at a level where they are being interviewed in the media have reached a certain level in their profession.
Some of the basic requirements to arrive at this level include, but are not limited to - intelligence, empathy, communication skills, an enquiring mind, an ability to think about things outside the self - and so on.
This makes them more interesting as conversationalists than say - a fourth-fomer, or a child, or someone who does not have any views or opinions on naything outside their immediate orbit.
So I don't think they suggest that they have any 'insight' about life's mysteries, simply that they think about them - as do the majority of AB'ers.