I think call people what they want to be called. My children use shortened version of their birth names but I’m always so grateful when doctors or teachers use their preferred names.I’m happy to go with whatever name or pronoun suits the wearer. It doesn’t change biology but if it makes them more comfortable
That can only work in certain and very limited ways, though. Name and identity are not fixed or immutable things. Our identities shift and change throughout a life-time, and take on many subtle adaptations.
I have used several variations of my name/different names throughout my life - according to how I felt at particular times. Some older friends know and refer to me as one name, while other more recent friends and associates refer to me by another. I have no desire or right to impose on anyone something which does not feel right or comfortable to them, and I would never demand that. Relationships are social and therefore mutual.We are all multifaceted people with histories - and our 'identities' are flexible to some extent because they are socially constructed and negotiated.
Biological sex is not an identity; it is just a fact of life - universally applicable and acknowledged.This is one of the aspects of a person which is immutable; like genetic heritage; like race.... The idea of a 'gender identity' is entirely something that has meaning only for an individual - and certainly if this identity is in opposition to one's observable biological sex.
Some friends and associates may decide they are happy to indulge you in this role play and identity - and that is up to them........but nobody goes around the world attempting to police and enforce correct names or titles - unless terribly insecure or, to an extent, mentally unbalanced.One's felt identity is something private and interior, and if one is secure in one's self then there is no need to control how other people respond to or perceive you.
Funnily enough I received an email this morning from my daughter who is a bit of a Shakespeare obsessive:
Hazlitt famously remarked, "We are Hamlet". It is a pleasant thought – the thought that an invisible audience somewhere has access to, and applauds and validates, our every passing thought. A less pleasing idea, but perhaps a more accurate one, is that we are not Hamlet. We are Coriolanus ( Coriolanus constructed his identity and pride on a false sense of security. He tried to defend the indefensible)