What the! This chap doesn't make sense, if those bugs/parasites/kimono are attracted to guilt then that world should've had a global pandemic by now, studies/surveys show that more than 75% people feel guilt at-least 57 times in their lifetime.
@OgWrench It's never said that anytime where there is guilt the bugs will show up, only that the bugs can show up if there's guilt. They just had bad luck, it's not like it's common. Or like @imfromkissmangabutitsgone says in game terms you could see it as RNG