Seems to me that this person was either self medicating or even getting hormones through another source and has now decided to reverse their transition. The news story I read said that the doctors were "baffled". Any doctor who is baffled by this should turn in their medical license and become a tabloid reporter instead.
Given that he's under the care of Professor Ross of Sheffield University, I think you're probably wrong.
But then, the same kind of thing happened to me in 2005, and I faced the same degree of scepticism, and even hostility, here at Callie's. Elsewhere too. Others who have had it have had the same experience.
The people who have FtoM natural transitions due to 5ARD or 17BHDD don't face nearly the same problems. They're far more common, maybe 1 in 70,000 in the USA. So their conditions have been well studied. Almost 5000 in the USA alone vs less than 20 worldwide for us.
From "Gender change in 46,XY persons with 5alpha-reductase-2 deficiency and 17beta-hydroxysteroid dehydrogenase-3 deficiency". by Cohen-Ketternis:
Gender role changes were reported in 56-63% of cases with 5alpha-RD-2 and 39-64% of cases with 17beta-HSD-3 who were raised as girls. The changes were usually made in adolescence and early adulthood.
Weirder stuff happens than most people are aware of.