..Hm...
So..
In THIS case: all those Chiyo's speeches made of hatred towards teachers, A.K.A how careless and sluggish they are towards students..
...
She formed them just to beckon Ayumu/Osaka into false relaxation.
Just to morally throw her into the hole of desparated despair.
...
Turns out, teachers are not the only annoyed and rushed ones..
.....
[Though, I am very sure Yukari would push off Chiyo from her pavement of Destiny as well.]