That is a horrible, fascist, totalitarian idea. What next? Shall we round up the genetic defectives and execute them? Or perhaps simple forced sterilization?
Those are your words not mine. I'm simply talking about a better informed population. Are you personally afraid of knowing what your DNA would reveal about you?
Furthermore, you are assuming that there are just a few genetic defectives out there soiling the gene pool for the rest of us. I assure you, that is absolutely not true. As we get older, almost everyone ends up with one or more diseases such as hypertension, hyperlipidemia, diabetes, osteoporosis, depression, anxiety, bipolar disorder, etc. And as we gain more and more knowledge of the genetic component of these various diseases, we're going to find that almost everyone carries one or more genetic time bombs just waiting to go off.
I'm not assuming anything and the point you are making only serve to strengthen my case. I would very much want to know what my genetic challenges are as early in my life as is possible. Because most of those diseases you mentioned can be mitigated by lifestyle changes and the earlier those changes are made the longer you will get to live a healthier life.
Now, you may say that you really only mean people who carry the genes for really bad diseases. They're the ones who don't deserve to breed. Well, who are you to judge the worth of a human being? Is a man defined by a disease? Can a person suffering from even a serious disease not still make a contribution to society?
Again you haven't been reading what I've been saying. Not once did I ever say anyone didn't deserve to breed or make a judgment about it. What I did say is that you or me as informed possible parents can make better choices about who we will have children with or if we even want to have children. Maybe we would feel better adopting or choosing some alternative method. In any event it would be a better informed choice.
Consider Stephen Hawking. Has he not made a greater contribution to society than most able bodied and healthy men? Should his parents have been allowed to breed if it had been known that they carried the gene for ALS (the horrible disease that Stephen Hawking suffers from)?
Yes Hawking has made substantial contributions to society. Wouldn't it have been much better if he had a longer healthier life instead of being everybody's example of a defective made good?