Yeah I was confused by that as well. But, just to be clear-- there have actually been studies that have found both of those claims, that is, some have found transsexuals to have more health problems and some have suggested they have less than nonbinary non-transexuals.

It could just be my transmed bias or being part of the first study group

Totally fair. There's a lot to be said about the first wave of studies being a rough estimate. My own attempt at interpreting this possible finding was that people who don't medically transition, might have socially transitioned only out of social pressure or for social currency reasons-- as opposed to already having an eating disorder, body dysmorphia or other severe forms of psychopathology that pushed them into wanting to do a medical transition.

Also, full disclosure, I read the abstracts but skimmed and only read parts of those papers, so I probably missed something.