Literally all credible studies done show increased mental health outcomes. One done recently shows affirming a child’s gender leads to increased mental health. Hormones have a north of 95 percent satisfaction rate. Even bottom surgery has over 90.

Only wild conspiracy theories would even assert that it doesn’t lead to improved mental health.

You can challenge whether it’s appropriate or right on whatever made up moral ground you want but you cannot credibly assert transition doesn’t improve mental health for trans people.