Real-life transition is difficult, expensive, painful, and stressful (including a hard period of being part-way transitioned.) "If you could take a pill", or "magic-wand" or "pixie-dust" transitions, on the other hand, are the fantasy of sudden and easy and nearly painless and low-stress transition; the 'magic' transitions to "hot looking" especially have a distinct undertone of people accepting you as "really" being the new gender because the new body is "obviously" female. I suspect people's answers would be somewhat different if the proposal had been that they would come out looking "hot" after 50 operations over a 7 year period.

Secondly, it appears to me that a number of the MTF answering do not presently feel that they are already internally 100% female gender identity, and might not even feel at present that they are "more than half female" -- but they feel (or have the fantasy) that they would like to be female -- and to feel that they are female. If you were to give them female bodies but leave their present gender identity as-is, they might not care much for the result.

I know that in my personal case, I (usually) feel "no longer male", but I am keenly aware of the gap between that and feeling "female" and I don't know that transitioning my physical body more than I have would leave me any better off... but if the Pink Pill would cure that dysphoria along with changing my body, then from a "selfish" perspective, Heck Yes, and from a relationship perspective... the relationship as it stands would be lost, but my SO would understand that I needed to do it.

Thirdly, the feeling of gender dysphoria is a big strain to live with. If the Magic Pill offered to cure the dysphoria but did not promise a female body (maybe not any body change), then that in itself would be incredibly valuable to many of us. Still, in thinking about taking such a pill, one is led to the question of "What kind of life would you like to lead" -- and when I think about ending up "male", I (speaking for myself here!) feel a ball of unease and unpleasantness in the pit of my stomach. The kind of life I would like to lead is more closely associated with traditional female attributes. About the only traditionally male attributes I value are my relatively analytic mind, and my decent (but not "strong") "mapping" / navigation / sense-of-direction (I don't like feeling lost.) Would I choose the other kind of life mostly on the grounds that doing so might make my SO happier? I don't think so: that would be too much like wanting to be a different person, to not-exist. I have given up so much for the sake of others already in my life: don't make me give up more core.