A lot of people don’t even know his real name. Come on.
Arnold was a bad actor, but he was perfectly cast for his roles. His movie career coincided with the golden era of action movies. His major roles are iconic, and when he turned from action to comedy he was still incredibly well fit for the roles precisely because he wasn’t a great actor. Arnold was also very charismatic in his simple acting. He could play the average Joe. The Rock just can’t help standing out from the crowd. The only movie where he didn’t was Get Smart, but his role there was marginal and no emphasis was put on his physique. It would be much harder when he’s the main character.
Ultimately, The Rock didn’t even manage to be Arnie’s successor, which should make you think about just how goddamn iconic Arnold is. Arnie turned out to be surprisingly versatile, something you’d never expect from watching Conan the Barbarian. The Rock can’t shake the big guy image no matter how hard he tries. His comedies are small time compared to Arnold’s, and the time is long past for the bombastic action movies that made Arnie and Stallone the superstars of the 80s and where Johnson could really shine.