The societal roles of each gender are social constructions. But they have their origin in genetics. Men are the providers of the house because their bodies are capable of getting food easier than those of women.
gender, like sex, is something one is born with. Yes, gender ROLES are social constructs, but identifying as a gender in and of itself is a mental/biological thing. the concept of identifying as a gender was not socially constructed.
Biological sex is not a social construct, and gender is synonyms with biological sex, despite how you use the word "gender" it is not a social construct. what you do because of the gender is a social construct.
What You, and others around you, Choose To Do about what gender or biological sex you, or other individuals are, is a social construct. It is not genders fault, good/bad, for how an individual is treated. Gender is scientific, people simple choose, good/bad, to add in everything else.
If you sign up for a website that require you to input your gender, it says male or female. You can change between the two, but you can't be anything other than those 2. Therefore, gender is not a social construct. Gender and biological sex are the same.
The argument is an equivocation. Both words are ambiguous, and do double duty. The fact that word can be used synonymously with another does not mean that there is no distinction to be made in meanings. The question is whether they can be used to mark a real distinction, not whether they can be used not to.
Circular reasoning. Dictionaries don't give words their meaning, they barely try to capture it. Moreover Oxford dictionary reads "The term is also used more broadly to denote a range of identities that do not correspond to established ideas of male and female."