I tend to view titles as having different levels. So nursing, teaching, accounting etc if someone describes themselves as nurse, teacher, accountant whatever, I don’t necessarily assume they are the registered, practising highest level
I used to work in a library, and sometimes I would just say librarian when in fact I was a senior library assistant. Usually to people to didn’t care about the intricacies of the job or not know/care that not everyone who worked there was a librarian. In their eyes, I would still be a librarian no matter what my official title said ‘cause I worked in library. If anyone pressed further I would say well I’m actually , or sometimes I say I work in a library to avoid the confusion.
I’m now a medical secretary, however my in-laws still think I’m a nurse no matter how much I tell them otherwise, since I work in a hospital and with doctors 🤷♀️ I still correct them on this though but it’s futile.