No. Birth defects aren't contagious and are not often fatal. Also -- where do you draw the line between "defect" and "cosmetic enhancement"? It will become a race to the bottom.
Because science and technology alone cannot save us from destroying ourselves. Einstein, MLK, Carl Sagan and many others warned of how our scientific progress has been outpacing our human social progress.
Case and point - our scientific progress has led us to create tools of global genocide. Technology has always been a double edged sword.
People never needed technology to commit genocide - there are plenty of examples throughout our whole history.[1][2][3]
If anything, now that a significant portion of the world has nukes, we haven't had two developed countries at war for perhaps the longest period in recorded history.
1 - https://en.wikipedia.org/wiki/Siege_of_Baghdad_(1258)
2 - https://en.wikipedia.org/wiki/Albigensian_Crusade
3 - https://en.wikipedia.org/wiki/Thirty_Years%27_War
---
Case and point -> You meant to write "case in point".
Technology was used in all of those examples.
Technology by itself didn't create mass murder, but it does makes it much easier to do.
Well, not immediately fatal, anyway. What if a gene modification is developed that halves the rate of aging? Is it a birth defect to have a maximum life expectancy of only 120 years instead of 200 years?