Probably because it got tied to an actual famous child-game, that one rhyming game of not having the wolf catch you... Because the other name of "Promenons-nous dans les bois" is "Loup y es-tu?" "Wolf are you there?". As the whole point of the song/game is to sing that you are walking in the woods while the wolf is not here, else he would devour you - and you regularly call out for the wolf, who lists the pieces of clothing he puts on until he finally is ready to come out and hunt you down to eat you.

like it is genuinely an interesting thing to take the overpowered plot device character and give him a complex about where his value comes from, whether it’s his power and usefulness or because he’s genuinely loved as a person (and since he thinks he’s fundamentally evil somewhere deep down it can’t possibly be door number two) so who even is he if he doesn’t have something to offer all the time? so now he has another layer -> trying to be the overly responsible hero, learning as many skills as he can to still come in handy without those fancy powers (ie, lock-picking on the internet and boxing w bobby) -> circle it all back to his constant identity issues because of the trope he embodies: which parent is he most like? will nature or nurture win, and who’s to say what his nature really is anyway? who does he Want to be and how does it clash with the different outward perceptions of him? Etc etc.

even the things that clearly aren’t shooting for a deep new angle help lend to something more existing, like jack having personal wants for various things; a bucket list of normal, mundane experiences showcases how he feels about his own status and hunting, to a degree (I don’t think he’d ever give up hunting frankly). following the episode where he decapitates a mythological creature, exorcises and then hotboxes the second-only-to-god archangel Michael up with an episode where he does groceries and tries to socialize with other kids establishes both the domestic routine of the team and more of what jack wants/prioritizes for himself. the overpowered plot device character who’s secretly insecure about his own value and genuinely feels isolated by his own nature just wants to be normal and figure out his place in the world.