Biological sex is importantly distinct from gender, and biological sex is quite real and crucial to differentiate in a medical setting.

I work in biotech. I absolutely understand and agree that a person should be allowed to identify with whatever gender expression they want to.

But in a clinical context: no. Full stop. Biological - that is, chromosomal and unaltered phenotypic - sex is very often a crucial data point to understand when testing or treating a patient. It’s science. Chemistry and biology do not give a flying fuck about anyone’s feelings or sensibilities on gender identity.

Edit: as I hoped was very clearly evident from my comment, I am fully aware of the distinction between gender and biological sex. The only reason I even made the comment is because, even at the biotech I work with, sometimes people still conflate sex and gender. Lots of people cross it up all the time - intentionally or unintentionally.