We've covered this in the PED thread.
Yes, it is a performance enhancer. Performance is relative. Plain and simple.
If you have asthma, and you can't ride/race without your inhaler, then you went from ZERO cycling performance to being able to compete.
So baseline zero, not competing at a higher level. How is that not performance enhancement?
Performance can't be judged relative to another person, because each person is unique. But certain medical/testing practices and standards can maintain a level playing field to an extent. Better than the nonsensical system in place now.
I could make the same argument then that testosterone, those with very low levels, below 300ng/mL, and experience lack of energy, ability to train/compete, should be allowed to take a reasonable amount of bio-identical testosterone, to increase there level to mid-range of the well known testing standard.
The same thing just happened...you went from nothing, to just an average guy with an average level. Testosterone doesn't make you a super-human person, despite all the ignorance and stupidity of the media and people in general regarding hormones.
The same principle applies, and should be applied sensibly to all medicines. I'm not saying people should be allowed to take non-naturally occurring steroids like EQ, Var, Winny and the likes...just bio-identical and they are closely monitored.
State of NJ athletic committee is taking a stance similar to this in sports.