Eat to Live - Another "lifestyle" change?

So I had an appointment with the surgeon today to schedule my thyroidectomy (it's gotten larger, ultrasound in July said it's bigger than it was on ultrasound in December). Not a problem, I figured it was going to have to come out, I'm prepared for that (surgery is scheduled for Sept 13).
What I wasn't prepared for was the surgeon telling me that there's a program at the hospital that I might be interested in, she and several of the staff are following it and are really pleased with the results. It's based on the book,Eat to Live, by Dr Joel Fuhrman. From what I read of the reviews on Amazon, it seems like another diet to me, disguised as a "lifestyle" change. It claims to be able to cure type 2 diabetes, help fat people lose lots of weight in a short amount of time (and maintain that weight loss), and cure the other diseases that are correlated with being fat. Sound too good to be true? Yeah, color me skeptical. I've heard it all before, done it all before, and none of it has worked for very long. Now I'm not averse to trying something that might help with the fibromyalgia and the digestive issues I have, but a "lifestyle" change that tells me I have to limit the amount of meat I eat, increase the amount of fruits and vegetables I eat, and eat more beans/legumes/whole grains when eating those fruits/vegetables/whole grains means I'm going to be spending the majority of my time in the bathroom - sorry, it ain't happening. Yeah, that kind of "lifestyle" change will help me lose a lot of weight in a short amount of time because I'll be shitting my brains out and dehydrating myself with diarrhea (those digestive issues I have from the VBG). Not exactly healthy, in my book.
When I explained that to Dr M (the surgeon), she said I should try modifying it to what I can eat without issues and see how I feel in 6 weeks. Ok, so for 6 weeks, I'm going to basically eat very little meat, very little/no dairy, no fruits/veggies/grains (digestive issues), and beans/legumes/rice. Sorry, that's not much different than how I eat now, except that I do occasionally eat veggies and deal with the issues they cause (oh, and I eat more meat than she thinks I should; sorry, not giving up my pork/chicken/shrimp/fish/steak/roast).
What is it with doctors that they think they have all the answers and have to dispense them, even when their patients aren't asking the questions? I didn't ask her for a "lifestyle" intervention, or a way to lose weight, or a way to lessen my pain from fibromyalgia or arthritis. All I want her to do is take out my enlarged thyroid. Once that's done, I'll probably never need to see her again - I'll go back to my endo for any follow-up care I need, like thyroid hormone replacement therapy. If she's following this and it's working for her, for whatever reasons, fine. But please, she doesn't need to be proselytizing to her patients about it unless they ask her advice on weight loss or how to improve their lives with diet (she even wrote the name of the book and author on her card, gave it to me, and told me I could find the book at Barnes & Noble if I wanted to look through it before I bought it!).