Pedantic
Legend
That's a complicated question with elements of genre, religion, and folk history woven in a difficult to disentangle way. There's a recent costume drama that has a recurring element of murders appearing to be done by supernatural means that are then discovered by the lead characters to have in fact been done using completely explicable material arts techniques, like the Flying Skill.Several people have offered real life examples refuting what I'm saying, and I've accepted those.
But, for example, are you saying that the stunts traditionally associated with wuxia are completely bereft of supernatural aspects?
On the other hand, that same genre has a long established tradition of people who are not experts, can't or never will undergo cultivation and have essentially the same mortal capabilities as people in the modern world. The category of "supernatural or magic" doesn't neatly conceptually align with what's happening.
If you were using "supernatural" specifically to differentiate that class of "mortals" then it fits, but that doesn't align with the in genre understanding of what's happening.