This is where I think we are in danger of losing respect and losing the battle - particularly from the younger generation. If it matters so deeply to someone and they are trying to live their lives as the opposite sex, then I would always use their choice of personal pronoun. It's polite and respectful. My children and their friends would be horrified if I argued I shouldn't - and I think they'd be right.
I understand how much it grates when I look at some of the vile misogynists currently berating women - but I have to say that if feminists are seen as being deliberately hostile to individuals, as opposed to passionately assertive about the rights of women, then it just feeds the hate narrative. And to date, I don't see that hate on our side. Fury, outrage, fear, exasperation and determination but not hate.
I am being truthful when I say that trans people should be able to live their lives in safety and free from discrimination and bullying. And therefore if someone wishes me to use a particular pronoun, then I will use it out of common courtesy.
This is a world wide phenomenon and we won't take the majority with us if we are seen to be bullies of individuals! That's how the other side operates and why they are in trouble at present. There are so many battles to fight and we MUST take people with us or this toxic movement will never be successfully challenged.