> any claim to be male, female, non-binary or whatever must be accepted at face value. And that the person who is making the claim should have the right to any treatment that they wish, up to and including surgery.
I can understand some caution around the latter part of this quote, given how traumatic, invasive, and costly surgery can be. It is a defensible and reasonable position that there should be _some_ barrier-to-entry to such major decisions (especially for children), even while there's also a simultaneous reasonable concern that such barriers will be used to prevent access to folks who genuinely do need, want, and would benefit from it.
But how can anyone _possibly_ deny the first part? How could anyone contradict an individual who states their own gender - on what grounds can you claim to know how someone feels about themselves better than they themself do? Even the position of "they are confused" or "this is a phase that will pass" or "they have been pressured into that belief" doesn't hold water - until that phase passes, that person's gender, their self-image, _is_ whatever that phase dictates. That doesn't make the current situation any less true. If you told someone "I like broccoli" and they responded "that's just a phase, you'll grow out of liking broccoli soon", your response would, presumably be "...so? I like broccoli _now_, what does your guess about the future have anything to do with it?"
Does your position on "accepting gender at face value" change if the statement "I am male" is replaced with "I see myself as male"? Are you more comfortable accepting the fact that someone's self-image can change over time, rather than imagining that gender is some abstract immutable inherent property?