Didn't need a study to confirm that playing along with a person's delusions wouldn't improve that person's mental health. Of course they will blame something else. It's the way society treats transgenders that stresses their mental health not cutting off their penis and making them look like some monster. That could only help by affirming their beliefs.
We should treat schizophrenia by just telling those people that the voices they are hearing are real. No idea why we would think anything else could be more effective.