On my guest spot on the Women At Warp podcast episode about it, I talk at length about why the speech is so good and the episode, despite some flaws, was really good, esp for its time and for not even meaning to do a trans episode
https://www.womenatwarp.com/episode-67-the-outcast/
And even though the ending of the episode is a downer, I believe it's important to show that even if conversion therapy worked, it's wrong. That's the power of the ending, the audience is supposed to feel horror that she's been "fixed" and that she's essentially been killed by death of personality. I disagree that it should show that conversion therapy doesn't work, because that's not the only argument against it. Like if one day they DID find a way to 100% "fix" queer people, it would STILL be wrong.