The term I think you mean to use is “Medically Necessary”. Whether a medicine or procedure is medically necessary is a question best left to the patient and their doctors.
Since we don't live in a perfect world, we have gender. And, being humans who like to categorize and make things fit into tidy little boxes, we group and put labels on things.
Who am I?
I've recently come to realize that I'm genderfluid. No, I'm not some puddle, and you can't use a mop to clean me up (well I suppose you could, but I wouldn't let you). I'm genderfluid: I experience my sense of my own gender as an frequently-changing place somewhere on the gender spectrum; and sometimes multiple places on the spectrum simultaneously; and sometimes I'm not even on the spectrum. Confused? Me, too!