This is better, because we're talking about the lower range right now anyway.
That said, I think the difference between 144Hz and 72Hz is a lot more subtle and can't be seen if you try to glance at them directly. Try viewing them with peripheral vision and there's a difference in smoothness. That shows up in things like moving a window around (or even just moving a mouse). It makes a huge difference in input latency/response, but the difference can't be seen easily by just staring directly at a moving image.
I went outside and took a 4k video at 24fps and played it back. It looks smooth as butter, just like a movie. Then I took the same video, but recorded at 60fps and re-encoded it in 24fps. It looks like the example on this website, where it looks jumpy.
I assume this is because of motion blur.