Try telling the DA that you never went to school to get a degree but you felt it was appropriate to call yourself a Rabbi. Dena d’malchusa dena.
Are you actually trying to claim that rebbeim and menahelim who use the title Rabbi are doing something illegal and assur? You’re not serious, are you?
I believe studying Torah changes a person. Serious study and focus on Torah topics (yes, even hilchos melicha), particularly with a talmid chochom, changes a person.
That’s all true, but doesn’t answer the question: why davka melichah?