The short answer, Hugh, is no.
My thoughts are much as yours, lovescoldmetal.
I've seen it on Sexcetera but, as you say, it seems to be the silly over-the-top stuff, the exaggerated nurse's uniforms etc. The subject, as most of us enjoy it, is very much 'underground'. Most people, I guess, have 'kinks' of one sort or another but don't necessarily talk about them in specific terms. I've never made any specific reference to my thoughts on medplay to anyone, and of course that's common among us.
I don't think most people would be surprised by the nurse/doctor thing as depicted on Sexcetera; it's not unusual to find a general theme of uniforms when people are 'fooling about', I'm thinking of strip-o-grams and the like, with men and women in police uniforms, etc. Most folk (not just us lot!) played doctors and nurses when they were youngsters. Only the other day, a neighbour's 5-year-old granddaughter was playing in a nurse's uniform.
That's it though, a ten-minute prank to be put away until it's time for another lark. What I think would be a shock to many people would be anyone taking the thing seriously, as we do - having it as an important part of our lives.
I don't think it's a case of the tv people shying away from doing it (they don't display much reticence these days), I suspect that, unless they're into it themselves, those that commission these things just don't realise that people who think as we do exist; and if we do, not in any number to be worth a story. LCM's right (and she IS a pro) to say any pros would be brave to speak on the record, albeit anonymously - so would people like us. They would also be risking their careers. Yes, people would be put off consulting them, whatever they said about 'separation'. If you knew your cleaner, say, liked planting listening devices in other people's homes but swore they didn't do it with their own clients, would you keep using them? I imagine here the British Medical Association (doctors' regulatory body) would have something to say - along the lines of 'bringing the profession into disrepute', I would imagine. The fact that medplay is not illegal would, I believe, make little difference to them or to the public.
Even in areas where fetishes are catered for, 'playing it straight' seldom comes into it. Tried finding videos where they do so? Of course you have. When you did you found the silly uniforms, 'patients' loving it, and a 'doctor' who couldn't get the exam overwith fast enough so he could, literally, get on top of his work.
The only serious documentary on fetishes I've seen was made in 1996 by Nick Broomfield. Titled 'Fetshes', it mostly covered 'femdom' and there's only a brief mention of things medical, and a sight of a room for doing sessions. There is a website, Nickbroomfield.com, and 'Fetishes' can be watched, in full, at film4.com - to my friends on here who are outside the UK, I'm unsure if it's available where you are; if it isn't, take heart, from a medplay point of view, you aren't missing much.