I'm not too worried about catching a desire to have one of my favorite body parts cut off so I don't think smoking is a good analogy.It is like someone hunting or purchasing a pink car or smoking. It is not your business so why bother and you make it a headache for you? Well, it is not your business unless the person makes you a secondary smoker.
I see the importance for those who are having rights stripped due to identifying as transgender. Those in the minority must always be ready to defend their rights. As to those who wish to take away one's right to have a sex change? I don't know why they consider it important to take from those in the minority.I don't know why some people consider it important to debate about.