It’s nothing esoteric, it simply has to do with the audience’s conditioned eye. Films have been shot/shown at 24FPS, reality TV/documentary and the like have been shot/shown at 30FPS. Thus when people see a narrative film shot at 30FPS, it hinders the suspension of disbelief because it reminds them of reality tv.
I once walked into a Circuit City and saw the latest Indiana Jones playing on one of their TVs in the front. I was very confused because it looked like a behind the scenes making of video, but there wasn’t any making of, it was just the film playing. This was before I learned about the 120hz and 240hz marketing gimmicks, so the TV was messing with the frame rate. My point is that even with a cinematic film like Indiana Jones, when someone messed with the frame rate, I thought it was home video.
-Brandon