Alexander Graham Bell. How can the guy who invented the telephone be overlooked you ask? It’s actually pretty low on the list of his (yes this is subjective) coolest achievements. His Wikipedia page is a blast.
I think you missed their point. They explicitly said that you can at something is a good product and just not buy it because fuck that company. Same point with artists, they can be talented shitbags, we avoid them for the shitbag part, no other reason.
I like how in JJK it’s a chance to create variation in power levels while also allowing an in-universe reason to expo-dump about a character’s power.
It makes a shonen trope feel like these genius characters aren’t just giving away all their tricks for shits n giggles. But then sometimes we just get a total lack of explanation and that’s fine too because it’s more fun, and the character doesn’t need to (cough Sukuna)
The ol’ Brock effect, a character who’s job 90% of the time was to tell the audience what was going on. More forgivable in a kids show, used to happen way too much in more adult shows too