Paper Moon wrote:
A couple of reasons:
A) Until recently, this technology wasn't practical nor reliable. It was only a recent innovation (I believe involving the Heisenberg compensators [which actually does make Treknological sense, sorta]) that allowed the Andorians to do this.
B) You don't think this plan might have big deal, long-term ethical and practical ramifications, particularly if implemented on a large scale? To say nothing of the potential genetic problems that might result.
You're forgetting that a similar accident occurred in "The Enemy Within" and Spock was able to duplicate the accident and reverse engineer it.