It is important to have such options
Why though? Especially since we all know that on the Internet, everyone is male unless proven otherwise.
Exactly. This is how internet users have operated for a long time. It does not mean they are sexist, it is just used as a default gender when unspecified. Also I don't see Theymos wasting time attempting to code more options because it is difficult to make everyone happy while simultaneously keeping database bloat low.