BirdDancer, that seems really strange to me that your doc is giving you their opinion like that. I could see him discussing the fact that a move like that could have destabilizing affects, or recommending that you try to get a feel for the type of care you would be able to have access to, but for a doctor or therapist to outright tell you what you should or shouldn't do seems very strange.
I think it would be more helpful for him to help you to get plans in place about what you could do to see if you will feel comfortable with the available doctors and therapists in the location you choose to live. And he should help you get some strategies in place to deal with the potential of having some unstable mood during the transition to the new country and culture. Things like having friends who you could call to get grounded if you feel overwhelmed by the change, or suggestions on finding support groups and developing new friendships that can give you a sence of normalcy.
His statement about the healthcare professionals in France is really odd. Considering that you just told him you are seriously considering moving there the should not be derailing your seeking healthcare in your new location no matter where you choose to live. His statements are only going to make it harder for you to transition emotionally. He can t speak to the training and skill of every doctor and therapist in the country after having met one! That's just crazy! I mean I met a cat that was really mean in at someone's house in a nearby town, but I don't assume every cat in that town is mean!
Sounds like he needs to learn boundaries of what he is and isn't supposed to do as a professional. But that's just my opinion.