Again nobody is 'respecting' sex, when they report it.
However, gender is not a 'neutral fact'. It is socially constructed and not constant.
World Health Organization:
"Gender refers to the characteristics of women, men, girls and boys that are socially constructed. This includes norms, behaviours and roles associated with being a woman, man, girl or boy, as well as relationships with each other. As a social construct, gender varies from society to society and can change over time."
It would be the belief that a woman should not be able to vote on equal terms with men (UK, till less than 100 years ago), that a woman should not be able to leave the house (Afghanistan, now) or that football is a boy's sport (UK) or a girl's sport (US) or that boys should wear pink (until mid twentieth century) or pink is only for girls (late twentieth century to present).