I would prefer to listen to transpeople as to what they think about sexual reassignment surgery
As transsexual myself I can give you my perspective.
Changing sex is impossible. The best SRS achieves is an "artistic representation" of a vagina which creates a body more in line with a person's preferred gender. There are many risks with the surgery.
There is however one important point to consider. For many, especially those AGP, the belief is that SRS gives a vagina comparable to a biological female but truth is the vagina is a non lubricating, non stretchy inside out scrotum !
Where SRS is successful I believe is for those whose focus isn't so much in having a vagina but those for who dysphoria/dysmorphia means having a penis causes extreme distress and they just want rid of the penis.
For me I cannot begin to describe the years since childhood of hating my penis... the many times I tried to work out ways to self mutilate. The times I used to plan doing something in a hospital car park. The body modification artists I researched who I thought could do something. An erection would trigger a panic attack. I grow up seeing my penis as a birth defect or cancerous growth and no amount of therapy changed that.That's a very very different scenario to "I like vaginas so I want one".
I wholeheartedly agree with many here that unrealistic expectations are being given. I do think in some cases there is a tremendous value in the operation but for many it isn't going to resolve anything.