I am going back through a really good book by a cognitive researcher, Daniel Willingham, titled Why Students Don't Like School.  I have read it before and am really impressed with the issues he points out about findings in cognitive science and the applications of those findings to education.  I recommend it for anyone interested in understanding learning, and perhaps how we need to rethink our over one hundred year old model of school.  Here is the first of nine points that guide his chapters:

"People are naturally curious, but we are not naturally good thinkers; unless the cognitive conditions are right, we will avoid thinking."

So, unless there is a high likelihood that we will succeed in thinking, and get the rush from that, we will avoid thinking at all.  Given the hours I have spent coaching and teaching both adults and young people, this actually matches my experience more than the idea that people enjoy thinking.