Yeah all the studies they reference to prove surgery is good only follow up for like 3-5 years max. It's either intentional misleading by chopping off the data as soon as lt looks bad or a less malicious version. I have also heard that it becomes exceptionally difficult to get people to participate in studies long term. They all stop responding to the studies and then the scientist loses hope for long term data. You even see it with people who regret the transition. Some of them still claim it was the right decision at the time or they refuse to say anything because they still buy into the propaganda that saying anything negative is "literally killing" people.