Why don't they realise yet? Stat-based combat systems aren't fun!

[Mack]

For all that I know, if it has different characters, 1+ cities, antagonists, Story and Lore, then it's an RPG by 87%.
Battle styles, skills and armory goes into a 10% of it.

I don't know what this even means but your "87%" pretty much engulfs all modern video games. By your definition Call of Duty is an RPG.