Of 546 eligible persons, 201 (37%) responded... Postoperative satisfaction was 94% to 100%, depending on the type of surgery performed.
So it's not really accurate to say that 94% are happy. It's 94% of the 37% who answered were happy. What about the rest??
I’ve read they don’t ask if patients are happy a year or two later. Most detransitioners return to normal after 5-10 years.