If you eliminate trainers and stallion owners. Lets consider the ideal. Most of those in this highly desirable group are already so successful at what they are doing they don't have the time or the desire to be a judge.
Truth is, guys, the most qualified and available persons are already in the center of the pen.
They are only concerned and impressed by what they appear to see or want to see on the outside. Also, there are selection committees and show committees that prefer to hire judges that can be manipulated and are predictable, because they do not want someone in the pen with strong personal views. It would be appropriate for a judging committee or organization to award a temporary license to judges their first three years and then do a complete professional review and evaluation of them at the end of the three years and every 10 years after. The bigger associations should also consider doing drug testing and personality and character testing. Most every worthy profession, and some that are not so worthy, have annual evaluations and reviews of their employees and their licensees.