such as like this:
The concept of gender identity is said to be real as an experience, (like how theists claim to see god [a claim basically]), but scientifically under-defined, weakly grounded biologically, and sometimes treated as more fixed or explanatory than current evidence justifies.
Your analogy is more telling than you think it is, and argues rather strongly against the idea that right wing transphobia has worthwhile points.
Yes, the (non) existence of God Almighty is both philosophically and scientifically unfalsifiable. But we don’t as societies use this to assert that every last person who proclaims a faith is telling an intentional lie about belonging to a religion
Gender is not like whether or not God exists, but is instead like what church you attend.