I don't know if more people are choosing this as an option.
There can be many reasons for such a personal choice. But from what I am seeing, many of us want the surgery but are unable to obtain it for various reasons(health, finances, or non-availability due to political pressure).
As more people come forward to embrace their identities, that leaves a backlog of people waiting to have surgery. As that backlog grows, it could appear that there are more people in the category, even if they did not choose to be there.
If that makes sense.