"Orchiectomy does not physically alter your appearence or functional anatomy. Yes the testicles are gone but men with testicular cancer do not feel the need to transition. Erections are still possible and the normal process of orgasm remains the same".
I have to respectfully disagree on this. While an orchiectomy doesn't alter your functional anatomy altogether, it can affect erections & the libido both, far more than before the procedure. And the orgasm is not the same, it's a drier release & the fluid is much clearer. I speak from my own personal experience here. One would have to take testosterone supplements to restore a healthy libido in a fair number of cases. And men with testicular cancer likely aren't on lifelong estrogen therapy as transwomen are, so it really isn't the same comparison.
As for an orchiectomy not altering one's physical appearance, that also isn't altogether true. Provided one continues on estrogen therapy after the surgery, the feminizing effects become more pronounced as estrogen can work unopposed & unhindered after the massive drop in T levels. Even if one isn't on hormones, there is still some feminizing effect, though not as much as if one were on HRT. Besides which, an orchiectomy is irreversible, so if a transwoman ever had to stop taking hormones for a financial or medical reason, there is no masculinization reversion, so the feminine effects are locked in, along with there being a greater psychological effect to the individual.
Unfortunately, many of us haven't got the funds for SRS, which I would have preferred over having an orchi, but personally speaking, I have no regrets in doing it. My self-confidence has gradually increased & I feel much better about myself. I'm still planning on SRS someday. However, if it doesn't happen due to lack of funds, I am very pleased that I'll never produce massive amounts of testosterone again. Having the T factories gone means freedom for me. I'm enjoying the bulge reduction & tucking is far easier. My quality of life is better.
Ultimately, it's a decision that varies from person to person. Some may have been able to put money aside for SRS, in which case, I might wait & have castration done then. But in my opinion, while an orchi isn't as invasive as SRS, it's certainly a viable precursor.