Rats is right. There is nothing unnecessary about the controversy that is going on about whether hyperandrogenous women should be allowed to compete without lowering their testosterone levels. Its a really important argument and it should be noted that until CAS intervened, it was accepted that they did indeed have to lower their levels.
When Semenya was competing with their testosterone levels lowered, she was still a really good athlete, but her times dropped by about 5 seconds. Now that she no longer has to do so, her times have dropped back down again. She's gone from threatening the World Record to nowhere near to back to threatening the World Record based more or less entirely on her testosterone levels.
Women and Men compete apart from each other because their body chemistry is so different from each other that it is not a fair level of competition. In at least one incredibly important matter of body chemistry for athletics, Semenya registers in the range that says Man not Woman. Whether they should be counted as Women at this moment, whether its fair on Women that they are, yes, that's controversial. This isn't like Michael Phelps having big feet, this is like allowing a Heavyweight into a Lightweight boxing ring.
None of this is criticism of Semenya. She is incredibly unfortunate to be the lightening rod for this. It must suck hugely, I feel sorry for her. But saying this is unnecessary is just not true. Trying to make this about her rather than the situation as a whole is disingenuous.
I hope CAS reverses its earlier ruling and brings back hormone limits. It is not an ideal solution, but it is the fairest - including possibly to Semenya, who still be able to compete by artificially lowering her levels, and will face far less negative attention as a result.
Here's an article making my points in far more detail -
http://fittish.deadspin.com/should-there-be-testosterone-limits-for-women-in-athlet-1778330172