An exception of a rule does not create a new rule - it simply means that the rule is not set in stone, every rule has exceptions. We generally have two sexes that actively participate in the cycle of reproducion - male and female. There are no other sexes, just malfunctioning mixes of the forementioned. An "Intersex" has no technical purpose, it's simply nature's "slip" during the development of the fetus, it's not a "sex" per-say.
I'm far from "ignoring" the rights of the "Intersex" people, much like I wouldn't ignore people who are handicapped. It's not like it's their choice to be born different. What I was saying was that at the end of the day they are either "more male" or "more female", it's simply a matter of percentages.
I'm wholeheartedly for sex adjustment operations and therapies, not just because of my belief in the binary system, but also for the health of those people. Wrongly-developed reproduction organs may cause unwanted pressure on inner organs that may lead to certain complications. Non-balanced levels of hormones may lead to wrongly-developing glands typically associated with given sexes, for example the thyroid, which in turn may lead to their overgrowth. I could go on and on about the "dangers" of hermaphrodism.
You can't have "the best of both worlds", in most cases it's highly recommended to lean towards the side a given body is better-developed towards, and the earlier the better.