If everyone has a 'gender identity' then we are all qualified to speak on the matter.
If a 'gender identity' is something that only some are born with, can't be measured, observed, or described, and on which subject only those who believe are qualified to speak, then this is a faith that the population as a whole can not be expected to honour with any more respect or weight than, say, astrology, or chakra balancing.
There's nothing wrong with believing in chakras and exercising that belief.
But the NHS should have no part in it, and the rest of the populace cannot be any longer attacked or derided for failing to agree that they need to identify their blocked chakras and support children in taking unlicensed medications to realign their chakras and in many instances, go on to have body parts surgically removed to conform to their inner feelings about their personal chakra alignment.
Yes, it really is that simple.