sigh Talk about misreading and making assumptions. I'm not even going to bother explaining or responding to the first half of your post other than acknowledging that I did generalize, which if you read above, I already pointed out when I wrote the post. As for the rest of your post, I'm not even going to bother as not only is it off topic, but you have also made your fair share of generalizations. :)
Back to these scenario of yours, if I had known you whilst growing up and believed you had not been with someone, then I wouldn't ask. Perhaps that's my mistake in assuming. If you were truthful and told me that you had been with someone, or had led me to believe you had been with someone, then I would ask. What would I ask? "Have you been tested?" It's as simple as that. If you answer yes, that's great. If you answer no, then I would ask you to get tested. No need to give any long speech about why I'm asking.
As far as I know, doctors are to be tested regularly as they often deal with patients with open wounds, etc. In that case, I would assume that if a hospital/care centre is keeping you in employment despite working with AIDS victims, then you are STD free. There would be a chance of you putting other people at risk if you weren't tested yet were still practicing medicine. The hospital could get sued which is why I assume they would want to cover their backsides by insisting their staff be tested.
Why single out STDs? Simple. For me, it's these diseases which scare me the most. Not cancer, diabetes, TB, etc.
You don't need to be sexually involved in order to get one of these diseases. You can get it from doing drugs, mishaps at hospitals, nurses using contagious needles .... it happens. Chances are, I would get tested for absolutely everything under the sky before I get married even though I have no reason to believe that I have diabetes, cancer, TB, any STD, etc. I'm not going to let my ego or pride get in the way. At this point, you not only have to consider yourself but also your future husband/wife. I would want them to know exactly what they are getting into and vice versa.
Khair, you have your opinion, I have mine. Now drop it. :D