Why would GCs need to agree with each other exactly on a question that comes down to personal perception, as in, what matters to that individual? You’re not going to get a universal answer to any of this other than your hypothetical is never going to happen and will always be hypothetical and should not be the basis for anyone to base their irreversible life decisions on. Also you are talking about one sex organ in a system of sex organs among other interconnected body systems. You don’t just change one and it changes the rest. It also doesn’t turn a male skeleton into a female skeleton and vice versa. Just like a male taking estrogen pills that come from the urine of a pregnant horse cannot grow breasts that will look like a female’s or make his body look female because the chest position is entirely different.

Healthy people with options want to be with people of the biological sex they are attracted to who are comfortable being that sex. Healthy people with options don’t want to be with facsimiles and performers. People who are spending that much time “performing gender” are inherently very self-obsessed and not spending that energy on something more productive or interesting. That makes them not partner material for healthy people with options.