this seems to be in the interest of not having parents make knee jerk and unhelpful reactions, instead of the doctors actually evaluating potential underlying conditions of the patient
from my understanding, we are trying to accommodate body dysmorphia because it is easy to accommodate: give people what they want and the rest of us just say a pronoun so that they don’t feel marginalized, but for science this is a stopgap solution and there is interest in understanding and preventing the dysmorphia to begin with. It seems this message gets lost because people don't want to be seen as transphobic or don’t want the “mental health” research to be misconstrued as “I want to ignore those crazy people”, as a lot of transphobes do consider things that way. While this is inherently a mental incongruence, it is easy to accommodate while we work to avoid it happening.