he had enough plot armor against Hakari to the point he was saved to be a play toy for Sukuna.
the difference between BumShimo, Himguruma and Kusakabe is the understanding of CE as we’ve seen all were knowledgeable the main key is fully understanding the flow of CE, bumshimo showed some watching the fight go down against GoatJo but the only thing he applied to it was dodging the world slash and only cause he had eyes that possibly exceeded 6E and had witnessed it prior. He had his own plot armor against Sukuna one Sukuna being nerfed and not having full reserves after fighting GoatJo then being immune to Lightning as we saw when Sukuna shot him with Kamutoke, that is plot armor for bumshimo… he also only survived his fight against Hakari cause they needed his points nothing further. Hakari would’ve won cause his Bumshimos CT is weak overall it’s a onetime use that kills the user, he’s strong as we’ve seen but that was his downfall he didn’t try to improve to the points that both GoatJo and Sukuna have.
Kashimo showed no other applications of CE outside of his CT and his lightning based attacks nothing further.
Choso seems to have just been one shot and also lost to Kenjaku while he beat Yuji I highly call that plot armor, if anything Yuji had plot armor against Choso…
you also seem to not be reading the actual story at hand as Sukuna himself the guy you love to wank states that all the brats have improved tremendously and he’s intrigued by them.