Suppose you are a smart person, and someone developed a drug that makes anyone who takes it 30 IQ points smarter. The FDA rules that this drug can be given only to people with an IQ at least 20 points below yours.
Would you be happy about this development?
I've worked around the FDA before. Making myself score 20 points less than I could on an IQ test would be simple by comparison.
Assuming I have a greater than average tendency to work around FDA restrictions then this restriction gives me an advantage.
(Unfortunately, some drugs that boost intellectual performance in the average case actually worsen performance in some who are already high performers.)
There was some talk here about height taxes, but there's a better solution - redefine shortness as a treatable condition and use HGH to cure it. They even got FDA on board with that, at least for 1.2% shortest people.
Unsatisfactory sexual performance became a treatable condition with Viagra. Depression and hyperactivity became treatable conditions with SSRIs. Being ugly is already almost considered a treatable condition, at least one can get that impression from cosmetic surgery ads. Being overweight is universally considered an illness, even though we don't have too many effective treatment options (surgery is unpopular, and effective drugs like fen-phen and ECA are not officially prescribed any more). If we ever figure out how to increase IQ, you can be certain low IQ will be considered a treatable condition too. Almost everything undesirable gets redefined as an illness as soon as an effective way to fix it is developed.
I welcome these changes. Yes, redefining large parts of normal human variability as illness is a lie, but if that's what society needs to work around its taboos against human enhancement, so be it.