The idea that we will somehow lose ourselves if we lose our GID is an interesting one, but not one that I believe is healthy. There are deaf people who believe cochlear implants will cause them to no longer be who they are - they feel the idea of being able to hear, even remotely, will damage their identities. Are they better off for remaining deaf? In all honesty, probably not, but they have spent so much of their lives identifying as such and bearing the brunt of the shame of it, that cognitive dissonance has dictated that they be proud of and become one with their condition. This is unhealthy. I call it unhealthy because they could be living far more fulfilling lives and be able to experience life in dramatically new and more convenient ways, yet they refuse such life improvements because of their warped sense of identity.
Refusing the pill seems to smack of the same type of attitude. Is our GID really who we are, or just a condition, something that, once removed, would dramatically improve our lifestyles?
My wife struggles with depression, pretty intense depression. She used to struggle with the idea of taking medication for it as she felt by taking it, she might not be being true to her identity. She later rectified this belief with the understanding that the depression meds (which make her faaaaar happier of a person and better able to cope with the world) actually were RESTORING her true identity, the identity robbed from her by her condition.
I feel a pill (gosh, if it only existed) would restore us to being the whole being we could be without the psychological distress brought on by GID. Refuting the previous example, no this doesn't mean MTF's are suddenly going to want to tromp off to football games (if they otherwise do not now), but it does mean we'll be comfortable in our own skins.
EDIT: I used the "pill" terminology after reading a few posts. To better fit with the OP, replace "pill" with "mental treatment".