Actually I have read up on such issues before, be it genetic or hormonal/environmental. It is still a marginal number of people.
1 in 100 of 300,000,000 U.S. population = 3,000,000 intersexed people
In a small town with a population of 1,000 people = 10 people
In cities of 1,000,000 people = 10,000 people
Intersexed people are to be found in every county in the United States in small to very large umbers, and all of them need to be able to use public facilities of some kind that is safe for them and for the other people around them in order to maintain public health. That is simple science and the physical facts of life. In past history the people who were intersexed were killed at birth or when later discovered, or were safely integrated into their societies. Christian doctrine does not permit such abortions and killings, so the laws must reflect that by making the circumstances of public health safe for everyone.