Agree. As far as the tenure debate, becoming a candidate for being science professor at a top university requires INCREDIBLE single-minded focus, from college through Ph.D. through postdoc. And for that, you get a chance at an academic job, because only a handful are up for grabs in any given year. It's an incredibly high-risk proposition, with a lot of opportunity cost. Your chances are helped immensely if you're not interested in any other activities beyond working in your field. It's a monotonous life in many ways. Not many people would want it to begin with - that's why the Aspbergers types are often the only ones who make it through the filter.