I'll reiterate my previous comment then: the existence of detransitioners proves that gender identity is mutable. From reading the accounts of detransitioners,

I'll reiterate my previous comment then: the existence of detransitioners proves that gender identity is mutable. From reading the accounts of detransitioners, gender identity seems to be more like a political or religious belief than anything else - often stable for long periods of time, but given the right circumstances, can be changed.