Not only that, but given the violent reaction by trannies to anyone who dares to become an apostate of troon ideology by dropping the charade, or even mentioning that they might not be a tranny after all, there's a culture of fear around detransitioning. Some are afraid of doing damage to "the cause," while others worry about being hounded by mentally unstable men in dresses for daring to suggest trooning out didn't fix all their problems. Some persist because it's the least difficult option, while others quietly drop it and disappear as best they can.
Add to that the fact that anyone who tries to study detrans rates gets harassed for troon wrongthink, and finding any sort of accurate picture is nearly impossible. I'm sure the rate is significantly higher than any study has mentioned, but there's so much bullshit surounding it that we may never know an exact number.