probably you and I read different studies, the one I read indicated 14 fps, although I think this is not important.
It's not about the advantage, just 2 possibilities appear at high FPS:
1. It is better to see fast-moving objects, if there are no fast-moving objects, then all the meaning of high fps is lost.
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2. It becomes possible to slow down time. You shoot 2 seconds at 60 fps and show 6 seconds at 20 fps. If I'm not mistaken, this was first used in the movie The Matrix.