Right, if they're keeping a strict 30 fps target with a completely new frame (that's ready) every 33.3 ms, that looks okay.
30 fps average with jerky, inconsistent frame times and tearing is going to look terrible on faster material. 30 fps average may mean some coming after 20 ms and others after 45 ms. And when the stuff is ready isn't in sync with the monitor refreshes. Inconsistencies in frame delivery look way worse compared to slower frame rates, especially if the game engine doesn't calculate positions and how far things should be along correctly. If you had 40 fps on PC, that would look worse than something locked and delivering a frame every 33.3 ms (30 fps).
Because consoles are fixed hardware platforms, you can plan exactly for how fast things need to be computed and run.