What you perceive, I believe, is not an educational bias but a cultural one. Almost all hockey players come from middle class or upper middle class families and reflect typical middle class family/moral values and work ethics. So you don't read as much about personal wreckage among hockey players as in some of the other professional sports. Hockey is not without its sinners, but there is not one illegitimate child for each player (numerically) as there is reported to be in the NBA, for example (Sports Illustrated), and I doubt if it's even one per team.
about why hockey players aren't arrested as often as other pro athletes.
also a great quote from another blog posting dated the year 2000:
Consider that a coach in the NHL making $600,000 per year controls about $32 million in assets. He needs - by motivating, cajoling, threatening, praising, begging, encouraging, and by using psychology, his experience and his intelligence - to blend these highly skilled, often very self-willed, sometimes egotistical assets into a team that performs to their highest level within a specified system, for 82 games. This through the sunshine of victory, the agony of defeat, the bounce of the puck, the scrutiny of the media, the vilification or adoration of the fans, and the watchful eye of the owner.
I don't know how they do that. So I won't be writing the book you suggest anytime soon.