I have done this for two patients who were not transgender, were married (wives in attendance for consultation, surgery, and recovery with full agreement and support), and have much experience with implants in the genetic male chest as I do a significant amount of non-genital transgender surgery, and have done so for over 2 decades.
Of course, incisions and scars are irreversible, but implants can indeed be taken out (which I did in one of the two patients). The important thing is having full informed consent, and realizing that surgery is not like changing clothing you don't like--it's real surgery with real (minimal, but very real) risks and potential complications. But that's true about EVERY operation I perform for every patient!
I guess ultimately it comes down to being comfortable about operating on a person, not a gender, and trying to ensure proper informed consent is given and received in non-judgmental fashion. I have seen lots of delightful patients with various kinds of gender identity disorder who are perfectly fine surgical candidates. I know there are other well-trained ABPS-certified plastic surgeons like myself that feel the same way. Good luck and best wishes!