[DanBC]

EDIT: The text you quote does not say that man / woman and male / female have different uses. There's nothing to say that male / female only refer to sex not gender.

If what you said is true (and it isn't) people would only need two questions on forms:

"Are you male or female?"

"Are you a man or a woman?"

This would make no sense and so we can safely ignore it.

[lowboy]

Yes, people do still conflate sex and gender terms. But language is increasingly shifting toward using male/female to describe sex and man/woman to describe gender because it results in greater clarity.

Sex and gender are separate concepts, and having separate terms for each is a net positive for the English language IMO.