necessity is the mother of invention.
If you can just wiggle your nose and shit happens, why wrack your brain trying to design a technological solution?
THAT is why worlds with magic need to have magic be something that only SOME people have, otherwise the world produced does not resemble anything we are familiar with, and is too alien for the player/reader to relate to. It is also why technology does not advance very quickly-- people can go see Mr Magician, and "Get shit fixed literally with magic", even if they themselves are incapable of magic. You see that sorta today with people pawning broken tech onto their tech savvy brother in law to get it fixed on the cheap. They are tech-tarded themselves, but know somebody that isnt, and can fix their blunders.
Same basic thing--- Different setting.
---back on topic:
In the case of "supernatural", simply look up the definition of the word.
supernatural
adj. adjective
1. Of or relating to existence outside the natural world.
2. Attributed to a power that seems to violate or go beyond natural forces.
3. Of or relating to a deity.
4. Of or relating to the immediate exercise of divine power; miraculous.
5. Of or relating to the miraculous.
Science deals with nature. It has no traction with things outside of nature. (Even things we consider "unnatural", like say assisted fertility--if you are right wing wacko enough-- still deal with natural forces and natural consequences. They are not "supernatural".)
Thus, by definition-- supernatural things are not verifiable using empirical methodologies. I did not misuse the word. The very concept of having true knowledge of the supernatural would necessitate that the individual in question themselves be supernatural. For anyone else, who would be shackled to the natural world, and natural processes as the only available tools to establish veracity of a claim, the very idea of having genuine true knowledge of a supernatural thing is a non-sequitur.