I'm surprised to see how controversial this comment has been. It's seems intuitive to me that as we are able to solve genetic defects with modern medicine, we'

I'm surprised to see how controversial this comment has been. It's seems intuitive to me that as we are able to solve genetic defects with modern medicine, we'd begin seeing more and more of them. I imagine even bad teeth, or poor eyesight would have greatly reduced one's likelihood of surviving and reproducing in our not so distant evolutionary past, let alone something like Type 1 Diabetes, or a chronic heart condition. That of course is just speculation though. Does anyone know of any studies indicating one way or the other? My quick search wasn't able to turn anything up.