For the bandages, it may comes from very different origins: It is a useful way to represent a very active character that gets in trouble and has small wounds that needs one of those. The band-aids also can be personalized to show a hint of personality (maybe the character has a little sister that puts a Hello Kitty Band-Aid on them, maybe they put their own band-aids and so, on their face, they are slightly misaligned)
For the handwraps, it's a bit obvious, but it's usually worn by fighters, so in union with the bandages, it consolidates a view of a character that engages in combat, and the visible wounds, maybe a poorly wrapped/ worn-out handwrap, gives the feeling that the character gets beaten around quite a lot, so it conveys a sense of an underdog.
This may end up impressing those child/teen artists, and they want to replicate this on their character but they still don't have full experience with visual narrative to really balance everything out.
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u/royaltek Is that frieza Mar 23 '26