Well, if you watch it, you'll see it clearly get supernatural (even if theoretically science-based, it's not explained).
ETA: And you certainly shouldn't be speculating on whether the kid is mystical when you have no idea whether season two added additional context that could inform your opinion.
Well, I was speculating based on what I knew of the MCU when Season 1 happened, and metahuman seemed the best explanation. I have literally not thought about the kid since then, and forgot about him until he was brought up here, so I was just repeating what my theory was at the time. I honestly don't really care what he actually was, because I don't care what happens on
Daredevil past season 1. The kid is dead anyway, so we'll never know what he was and its not relevant to anything now. Heck, looking at the wiki, it says that Elektra was another "Black Sky", while also confirming that she had no super powers. So, the kid could easily have been powerless the whole time, anyway. So, yeah, I got enough context about the kid and without suffering through anymore of the worst thing connected to the MCU.
In fact, the wiki basically confirms that The Hand has no confirmed supernatural elements, outside of possibly resurrecting Slasher Movie Villain Elektra, and since the MCU hates magic anyway I'm sure they'll eventually reveal that "Elektra" was never dead, just mostly dead, and The Hand just healed her. I don't really care, because Daredevil season 2 is worse then
Jessica Jones and its version of The Hand is almost as bad as its versions of The Punisher and "Elektra". If the Hand shows up in Iron Fist, I'll treat them as a different entity. I hope, if they show up, they're the traditional mystic ninja assassins.