Acer, you play the role of the main character in almost every game ever made.

Mario is a hero, he has a story. Is Super Mario Sunshine an RPG?

Samus is a hero, she has a story. Is Metroid Prime an RPG?

Crash Bandicoot is a hero, he has a story. Is Crash Bandicoot an RPG?

Do you understand what Senesia is saying now? Just because you play the role of a character, that does not make the game an RPG. RPGs use at least one of the three rules I listed earlier. If it doesn't have one of those three things, it's not a damned RPG. Period.