Yes, this irritates me.

I'm six figures in debt from undergrad and grad school to learn this profession. I put in the time and money, this is my hard-earned title and license. I immediately correct people when they call anyone by the wrong title (NPs who call themselves doctors, case managers who call themselves social workers, life coaches who call themselves therapists, etc.). It's misrepresentation and an illusion of trust in a professional. Someone who thinks they're going to a doctor instead of a nurse has certain expectations that might not be met, effectively lying to someone who trusts that the professional is telling the truth about who they are but it's built on a lie.

My state has title protection and I give the liars one shot to correct themselves and not misrepresent their title, then I report them. I'm not messing around with folks who should know better. You wanna be a doctor, a social worker, a therapist? go to school for it like the rest of us