This is a very clear sum-up of this particular point.

Another unfairness of this "equation" is that it's not just whether the dysphoria outcome hits Person A or Person B, like the "trolley problem" thought experiments where each person would be equally dead when the trolley hits them. In the real-life case of transition care, the cis (or temporarily trans, or complicatedly trans) person and the straightforwardly (transforwardly?) trans person have entirely different experiences of the transition train that they are or aren't getting. The person who asks for transition, then decides they don't want it, can always detransition. They have a major life experience which they possibly don't "regret" in the sense of thinking it a tragedy, even if they don't want to continue on that path right now—just as people don't always regret trying romantic relationships or careers they decide not to continue. They can even re-transition if they want! Which is THREE CHOICES! Whereas the person who asks for transition and can't get it is having a totally different life experience of no choice at all.

So it's like, 1 cis person's possible discomfort with the results of their own choice (a choice they may still backpedal to some degree, depending on what it is) is said to matter more than 100 trans people losing the right to make a choice at all.