Ok. But human beings are horribly short sighted. Something that may appear beneficial in the short term and on a small scale. but may turn out to be horrible in the long term and on a larger scale.
We have eliminated some diseases. But we have also created new, much horrible and powerful ones. We have discovered antibiotics, but that have also created disease causing agents that are resistant to them.
When ever we change something fundamental, that has resulted in the creation of much bigger evil. I think this is because we don't have capability to see the whole picture. We look at a small portion of it and think. "hey, we can make it better". But ends up messing up the bigger picture making it grotesque. So my point is, this is not an easy decision that should be made so lightly.