Not even 99.98% of people have unambiguous genitalia (it's about 99.5-99.97% [1]), before we even get to people with the "opposite" genitalia of what their chromosomes would suggest. An in any case, genitalia was only one of the 4 things I mentioned, and are also one of the ones that can be changed later.
Trans bottom surgery has one of the highest satisfaction rates of any surgery. You're entitled to your opinion, but I'll rely on the opinions of people actually living with the surgical results. This [1] lists a 94-100% satisfaction rate, which to me feels a fair bit higher than one might normally expect from victims of "mutilation".
This is one of the closest-to-perfectly-binary phenomena that exists in nature.