I've encountered that line of reasoning only rarely and agree with it, too. It isn't very popular though; I've gotten some negative reactions when I've brought it up so tend to keep my opinion to myself these days.
I remember some of the uproar when Katrina hit and the issues of people who could have ended up dying, and perhaps did, because they didn't get their medicine. The number of people who could be lost to diabetes alone is staggering. I know a number of people, myself included, who wouldn't be around without modern medicine's intervention.
If you followed the thread forward you can see we both sgree that modern medicine is a big plus, but it has to be followed to its logical conclusion, i.e. fixing the germ line of individuals with defects and fixing their individual problems. Other wise we have badly polluted the human gene pool. js1138 (I think) believes we will see the beginnings of this within 50 years, probably outside my time allotment. I hope he is right.