Have to agree with this. Nobody games at 720p on a top-end CPU. If the real world answer is that there is no quantifiable (let alone perceptible) difference because we reach limits elsewhere in the system, having the "top performing" CPU is irrelevant, as you simply can't access that power in any relevant way.
I think it was Tech Jesus who made the point that, yes Intel is technically better at gaming, but once you add in the real-world background stuff or try and stream alongside gaming, the Ryzen multicore superiority puts intel back in its box.