"your scientists were so preoccupied with whether or not they could, they didn’t stop to think if they should"
Ah hell with that reasoning.
The only time we should start questioning whether we should or not is when it gets into the realm of changing our genetic code. And even then, my answer is: hell fucking yes - just figure a way out to keep our population in check.
We're a terrible creature when it comes to ideal physical condition, it's just that we're also the best at adaptation (including the manipulation of our surroundings in the goal of adaptation).