You have to remember genetic desieses are mutations. As such they are random and part of an evolutionary cycle which doesn't really apply to humans that much anymore. We can prevent genetic mutations which we know about. In the future we might be able to stop genetic mutations we don't know about.
This opens up a whole new can of worms though. If we effectively stop mutation what about when one come along which is useful to us? It is eradicated by the gene treatment. It effectively puts man in a position where he no longer changes or advances.
These mutations could lead to us being stronger then any gene treatment could make us. Hell i wouldn't mind if we just mutated an imunity to the common cold (doubtful though it is.) But they are stopped and we eventually become stagnant for lack of a better word. The genepool could become extremely limited when you get down to the problem of "what is a desireable genetic trait and what isn't?"
On the flip side though like i said. Does many really conform to the idea of mutation and evolution anymore? Eh a bit i supose we do a tiny bit but nothing like the rest of the living creatures on Earth. And can we really justify letting a great number of people die because there may be a tiny chance in the future we will benifit on the whole? Or because it's natural?
Or am i just going way to far forward with this post? I dunno. One thing i do know is that the sky. Is blue.







