Dr Daniels has this chart showing that high mileage gives a tiny increase in performance for a LARGE increase in injury risk:
http://www.coacheseducation.com/images/jd-figure3.gif
Notice that Daniels has a line drawn at 60mpw. There's a reason for this...the curve to the right.
You have presented yourself at the doctor's admitting room with a training error. And while you are not paying him to be your coach, you ARE paying him to get you healthy and keep you out of the admitting room. Since you have not described yourself as a professional, elite, or post-collegiate (trying to accomplish professional of course), the MD probably sees you as a delusional/obsessive-compulsive type who is not likely to listen to him anyway, but he probably sees it as part of his job to try to talk some common sense into you.
You can either listen to the MD (or talk to a coach, but you probably know to much to listen to a coach, either) about how to stay healthy, or you can keep taking breaks in your training that you need time to recover from.
The key to long term improvement is consistent training over a period of at least a couple of years. You cannot improve if you keep visiting the admitting room with training errors...and that is the #1 thing obsessive, high-mileage freaks don't get (but I'll bet you doctor does).