This only captures the specific case where a specific person wants a specific pronoun.
I maintain that in a general case (when referring to a generic singular person) "he or she" is the way to go.
If it means a lot to people that we be gender inclusive perhaps we can think of more singular pronouns and then "he, she or X" will be the way to go.
Mandating "they" as an all-inclusive generic singular pronoun (to the detriment of any other pronoun) rather seems to overstep the mark, particularly for those of us who identify as a "he" or a "she" and not a "they".
Literally no one is mandating anything of the sort.
I personally *choose* to degender a lot of my language because I'm a medical professional also trained in psychology and clinical counselling and I happen to be tremendously aware first hand of how painful misgendering can be for people, especially misgendered adolescents.
Misgendered adolescents are at enormous risk for suicide. I've also seen multiple cases of misgendered kids go from dark and completely unreachable, to open, flourishing, bright kids before my eyes once they've been appropriately gendered, including non-binary. And their pronouns *really* matter to them, it's the way the world finally acknowledges that they are worthy of existing as their true selves.
If I can easily modify my language to be non traumatizing to suicidal children, that's a very, very small inconvenience for me and has a surprisingly huge impact on them. It's not a minor thing, I've had kids hug me and cry on my shoulder because I'm the first non family adult who can just naturally address them as they've dreamed of being addressed, with no awkwardness or mistakes.
So yeah, I don't treat it as a personal preference, I treat it as a public health priority. That's just my personal/professional reasons.