Theism is literally childish

[Neo-Scholastic]

You must mean like people who are hopelessly confused about their sexuality.

My eldest is transgender. While everyone is broadly supportive, there is one group which is not and hurls spittle flecked fulminations everywhere. The religious.

If someone has depression it does them no favors advising them to get over it. Conversely it is not helpful to normalize their illness by noting how many famous artists etc had depression. There is a balance. People with chronic illnesses should be neither demonized nor coddled. Gender dysphoria is a medical condition with serious health consequences. To frame it as a civil rights issue is as misguided as attributing it to mere personal choice.