Consent still remains a valid and essential point of healthcare and in the workplace.
I would argue that since NOT believing in gender IS WORIADS, then in cases where someone is not the sex they say they are, then for consent to be valid anyone impacted by the presence / treatment of the opposite sex MUST be explicitly given. It CAN NOT be the default that you go ahead UNLESS there is an objection since SEX itself is a separate catergory to GENDER REASSIGNMENT under the Equality Act.
And this is a male who DOES NOT have a GRC.