The pure mathematics, facts of the strongest kind, show that given the actual population data, the second strongest kind of fact, that the statistic based on a sample is not actually a fact outside of that sample.
The above three facts need to be mentioned when anyone such as \cite{Shapiro2016} or others who wish to make an anti transgender rights case. This UCLA study does not support their conclusion which is based on a simple over generalization of the findings of that study by commentators who are able to give the impression of intellectual rigor to the masses.