• Male and female are useful in biology, and therefore in medicine.

    As I explained in another comment, in human medicine it is much less useful than knowing what parts a human has and what lab results can tell us about the relevant hormones and other biomarkers of interest. Most people interact with medicine on a personal level, and because of such having more detailed conversations with your doctor(s) will often result in better care.

    With that being said, used as a broad term to describe broad effects such as when classifying data at the population level, it can be a useful and quick piece of information to collect. If you’re trying to determine compliance with social determinants of health, it may be faster to collect sex (or gender) than it is to ask people to create a catalog of the important body parts or to ask other broad questions such as “are you disabled” to understand systems better.

    It’s an interesting concept, to have a term which is most useful at a certain level of abstraction and less useful the less people you’re referring to with it. We’ve got a decent amount of these in our lexicons and yet I see people drawing false inferences all the time. It’s almost as in if we aren’t having conversations about how broad terms like race, gender, employment status, etc. can be useful when dealing with population level statistics for the purpose of understanding systems, but not particularly useful on an individual basis when trying to determine information about a individual or a small group of them.

    • I think I agree with you. I would go as far as saying this is true for everything, not only for science. I think we need to have categories to be able to grasp complex problem. And almost all of the time, those categories are arbitrary and only useful at specific scales and in specific context. It is the only way to think about large scale problems, just because we cannot handle every individual information in too large quantities.

      Those categories are always “wrong” in some sense, but can be “useful” to understand our world. And I agree with you, at individual level, in our society, for sure sex at an individual level is not only useless but harmful.

      Sorry, I recognize my position was unclear and could be taken for quite essentialist. Hope this clarify my position.