Just to add that years of -subconsciouly- straining have caused my vocal chords to have what we call a vocal tremor, which is the abnormal vibration of vocal chords، making the sound of the voice sound slightly uneven (this can be analysed by a doctor when you produce the sound "aaaaa" for 10 seconds. Dr. Kim said he sees this in the vast majority in his trans patients. Vocal tremor also happens in some young biological guys during puberty. Those who find the transition into adulthood and the voice changes that come along with it hard to accept, so they strain to achieve a higher pitch (which is generally associated with younger adults). A biologival man has a range between 80-160 hz, a biological female 160- 250. And a baby 250-500 hz.
A vocal tremor is a serious damage to the vocal chords. In the long terms, it makes the voice hoarse and the vocal chords unable to close evenly, which in turn makes it more difficult/ impossible to achieve a high pitch. I am not saying you have a vocal tremor, but just consider straining in your decision to undertake vfs.
Another point to consider is that with age, our voices (whether men or women) get deeper, and achieving a higher pitch becomes more difficult.
Last, but not least, vfs doesn't only change your voice pitch but it also changes its timber making it more feminine. Example: you can find a man and a woman with the same pitch ( say in the gender neutral zone 160-180 hz). However, their differenciated voice timber (and their inflection) will make them sound man and woman. It the the same difference obdeved between a guitar sound and a piano's both at the same notes. Voice timber is what gives our voice its uniqueness and helps determines gender (in addition to other factors of course)
Just bear in mind that vfs can be very challenging. Although it's been the least painful surgery I've had, not being able to speak for a whole month , supressing post op caughs (generated by phlegm), following a strict diet if no alcohol, coffee, spicy/fatty foods, chocolate for 3 months can be very challenging. I found it very frustrating the fact that si couldn't talk for so long (in my case I'm giving it 2 months rest).
Best of luck whatever you decide.
Rita