Ok, just a warning, there is a lot of "Musician Talk" here and if you don't play music or sing you might not get what I am about to say, I just want to save some time here
I am a tenor, I have worked at it and worked at it, there is another FTM in my choir, I am not going to give names because this is a public forum, there is an option in some of the music we are working on now for altos to sing tenor, and the FTM I am friends with in chorus he doesn't seem too bothered by his voice, but he has expressed a dislike for his body, he is kind of excepting what the choir teacher put him as, and I encouraged him to sing the tenor line for the songs where it is higher, he is starting with the same voice I started with, he can barely hit the F3, but I did something about it, and I didn't let it stay