The attitude of the Yukkuris to believe that they can defeat enemies above me is as absurd as that of humans thinking that filling of weapons can be safe from everything that you can kill them
I wouldn't really compare it with the people that feel safe having a weapon on themselves, the weapon at least have some backstory of killing stuff backing it up, unlike the majority of the stuff yukkuris claim about the world and themselves.
It's still dumb to depend on weapons for security alone, but it's more reasonable than assuming dominance for no apparant reason "just because" the way yukkuris do.