Well intentioned but in retrospect this line of thinking strays way too close to the Gnostic rejection of our mortal bodies.

The body is a holy vessel for the soul. It is the temple of God, as the Bible says. So it is important, as a kind of gift that we should cherish, but we are also not our bodies at the same time.

That aside, I'm not sure tackling transgenderism from a religious angle is the way to go. If anything it's coming from a mix of depression, alienation, predation by weirdos online, and being so stuck to a screen that they see themselves completely separate from their body.

It's all alienation from God, which results in an addiction to material things as a way of trying to replace God. (material things being the polar opposite of the spiritual) Drugs, porn, overeating, obsession with physical appearance or owning lots of stuff, desiring wealth or power; all are examples of the things people worship in the place of God, but physical pleasures can only distract you for a time. They can't replace eternal peace.