I think the issue is the slippery slope. The bladerunner does not seem to have a competitive advantage now, he is not dominating events and arguing to prohibit him from competition seems mean spirited and wrong on it's face. And right now the idea that a runner would amputate his feet, or his legs in order to install the latest version of General Dynamics "winatallcosts" robolegs seems ridiculous and contrary to the intention of sport.
But again there is that slippery slope to contend with, it is amazing what kind of nonsense competition can bring out. We had badmittdon players throwing olympic matches. Cyclists faking crashes, judges and referees cheating in boxing......all in the name of securing gold. Performance enhanceing drugs have been a reality in top level sports for decades. How is it so far fetched to worry that someone might seek to exploit a loophole in the rules to gain competitive advantage?
So all in all the bladerunner is a test case in this very issue, and even though I think this guy should be able to run in this olympics......I am worried about the precedent it might set.