Of course people vary in depth. Some people think about ‘deep’ stuff, although I wouldn’t call it deep, I would call it thinking. To some, deep is discussing child labor at work, and for others, deep is discussing what will happen when we die at work. I think some people just concentrate on whatever it takes to make a living, and that doesn’t require a lot of epistemological thought. Or some try to explore a wide range of things which gives them a better sense of reality. Both are beneficial, but a balance is preferred of course.