Let me like that coffee for you
I'm sure there's many good reasons why the picture of a slice of pizza will generate more “likes” than a witty comment about the state of the nation.
The psychology behind this behavior might be complex, the math is not: The significance of a message is always inversely proportional to its reach.
Case in point: A 10 year old who post videos about lip gloss on YouTube has more followers than the 100 leading philosophers put together.