However, I do believe that people should be accountable in the workplace for being kind towards others and not deliberately misgendering someone.
Nope. If, at some point, my sex suddenly doesn't matter, then I'm happy to say that their sex doesn't matter either. But until then, no.
Whilst one cohort disadvantages the other cohort, on the basis of sex, sex will matter.
It's way more than 'unkind' to force me to say otherwise. It's lying. Gaslighting. And potentially abusive.