Ronaldo doesn't even make that many runs (I would bet it is average or even bellow average for strikers). His quality in off the ball movement largerly comes from positioning rather than actual movement and sprints and if you watch actual goals he scored in ucl, it usually isn't a remarkable movement and a sprint, but having a sense to be in the right place at the right time. So this whole off the ball movement you are preaching isn't just movement per se, but it is positioning plus movement. Also Ronaldo has a significant edge compared to most strikers in a mentality. He is relentless in his playing style, always wanting more and more and more. Ronaldo is not some genius in terms of moving off the ball. He is great at every part of it, technical, athleticism, etc and on top of that he is relentless.