@MichelleofzeResistance
It's a question of competence, remit, terms of service, and the fact that the individuals comprising the people we offer a service to come and go as time passes, new ones appear, old ones reappear, and so on.
It simply is not possible for us to canvass every single potential user of our service because
a) we don't know who they are, due to the fact they might exist only as potential, and not current, service users
b) our terms of service are limited by geographical area, whereas these groups are not. So you might find, for example, that people in one specific locale prefer one term, whereas up the road it's something entirely different.
c) limitations of resources
d) It's a bit simpler with much smaller specific groups, including trans people, due to the fact that they are a much smaller demographic overall, and proportionately speaking have more in place in terms of easily identifiable advocacy, collective representation etc.
e) past endeavours have shown that there isn't a perfect concurrence between users who want to express a wish, users who have preferred terms, and users who will actually respond to an enquiry anyway. We find that people are often very vocal when they find something that offends them, but they are oftentimes quite shy when you ask them if they bothered to respond to the initial consultation. Humans eh?
Simply put, we don't regard any group as being of lesser importance when it comes to sensitivity, the practicalities of actually achieving some sort of consensus on what is actually appropriate is just an order of magnitude more difficult with some groups than others. Believe me, there's nothing more I'd like than to be universally regarded as inoffensive and anodyne when it comes to 'labels', but I honestly think this is a case of you are going to have someone's back up no matter what.