The surgeons I've talked to and the endocrinologists at the health center I go to won't operate on or treat smokers. It can lead to complications in surgeries, slower recovery times, and increases the chance of the HRT causing blood clots (which can be fatal).
I know I struggled quitting cigarettes, but I was finally able to with the help of vaporizers. It's really up to you, and I know how annoying it was for people to tell me to quit. However, I made a deal with myself, that if I were to transition, I wanted to enjoy my authentic life as long as possible. Also, because the clinics near me wouldn't treat smokers, I had to quit before I could start HRT