And "we do commonly accept that there are young people stuck in the bodies of old people (to continue to run the phrasing). I have a thirty year old family member with learning difficulties that has the development age of a 4 year old."
Surely we accept that there are some 30 year olds who have brains that are 30 years old by definition, but are referred to as having a development age of a 4 year old because that is a very simple and clear way of giving an insight into the capabilities of the brain concerned? We don't accept young people are stuck in the bodies of old people. Similarly, when we say a 40 year old smoker has the lungs of an 80 year old, we are not saying anything about the age of his lungs (which are clearly 40) we are talking about his lung's capabilities.
I agree that "it is possible to have compassion for someone and make accommodations for them without denying reality or putting others at risk." But I would wish to be very clear - the accommodations for people who claim to be trans should be things like great access to mental health support, and time off work to attend MH appointments. It should not involve any sort of pretence that there are some wrong sex spaces or some wrong sex language that should be used by / for them, and compassion and accommodations should (IMHO) be predicated on the trans identifying individual making a committment to try to overcome their MH issues.
I see no reason whatsoever to show compassion or make accommodations for malaga airports, or people who simply reuse to accept that their mental health issues that need treating are a mental health issues that needs treating.