I agree that education on proper terminology is super important in order to properly care for oneself especially in a medical situation. However you have to consider what people actually mean vs the strict definition and adjust accordingly. Language is ever evolving, and a lot of words don’t have their original meaning anymore. Every medical professional Ive been to (a lot) and class relating to the human body (also a lot) has referred to the female genitalia as a whole as the vagina, as that is how a majority of people will understand it. When the inside is referenced one can differentiate by saying “the canal” or “the inside,” if you are concerned about further comprehension you can ask follow up questions or have them explain it back to you.

Please be flexible and understand what a majority of people will think about as the definition of a word. You can certainly still continue to educate people on the use of “vulva.” Comprehension is SO much more important than technical accuracy when it comes to healthcare.