The title of the story is 'reason why myon type is rare,' implying that the stupidity is a common occurence amongst yukkuris.
Thus, the factory probably knows that the yukkuris are going to get killed very soon, regardless of whether any humans step in.
'Ah, you have some loud yukkuri? Don't worry, they'll be killing themselves veeerryyy soon.'
As expected of the Factory!Eh?
It'll be done in 40 seconds!?Hello!
Is it the Factory?
I would like to request a mass extermination ASAP...Ahhhhhhh!
Shut upppppp!
Shitty scum!"Myon has done nothing wrong-myoooon!"
"Reimu has done nothing wrongggggggg!""It-it's not like that-myon!"
"Judgement timeeeeeeee!"