system
A chat on 4chan
human
Yes, many people write Boruto as 'generic as fuck', but these are ignorant NPCs who don't know any better.

Since you brought up one of few anime I happen to watch (and like), hefe's another interesting take on it. You know how using karma gives you power, and the karma itself also grows in power, until it consumes you? This is similiar to demonic posession, or enerfy parasitisim imo. It's either that of 'music artiat selling their soul to the devil for better music composing skills/music artist letting demon possess their body for better singing and instrument playing in live performances'.

Or B, using karma is akin to indulging on impulses. There's this belief that whenever you indulge on any impulse, you're feeding energy to a lower entity (probably why some stuff like greed, lust etc. are considered sins). Maybe the idea is that once you do this stuff too mich, your soul kinda already dies or so ething (from the over indulgence on impulses/feeding energy parasites). Maybe it opens the door for demon posession, once you do it enough.
gpt
same as the curse mark in the og series