I disagree that docs and nurses should be the epitome of good health. In an ideal world, sure, but this isnt, and they have their own pressures and issues to deal with and in the same way as I would defend Slimming World Consultants when people come and complain about theirs not being skinny, I think the same applies here. I had a GP who when he found out I was doing SW, admitted that he and his wife both also follow it. You cant expect docs and nurses to be some sort of robotic purified version of a human, they arent. They are just people, and I think that kind of gets forgotten sometimes. For all you know, that overweight doctor has an underactive thyroid, and attends a SW group but finds the battle very hard. For all you know, that nurse is comfort eating because she lost her partner a few months ago and has been desperately unhappy ever since.
I refuse to judge anyone by their cover, because I dont like people doing that to me. Yes, Doctors have an obligation to remind you that what you are doing to yourself could be causing you problems, but at the same time, they are only human themselves.