Engineering360: "New algorithm identifies biological sex via dental X-rays"

How important is "biological sex" anyway? Having known and lived with a number of people who were born "with disabilities" I find it easy to believe there are many ways a human can be conceived and develop a little bit different. Most embryos or fetuses that develop differently just don't make it. But many survive and become genuine people. Sex or gender differentiation is a characteristic that does not always meet our binary expectations.

Why look at sex or gender and force a binary determination on someone else? Is it even anyone else's business?