Comprehension problems with the villainess anthology

[panzerkampfwagyu]

I'm talking about this one
Honestly, a thing I do not comprehend is how many of the mangaka participating do not seem to get how to make oneshots for it correctly.
Like, yes, you can achieve serialisations with these chapters, as the flowery path of evil has shown (And then also why continuing past the first chapter was a bad idea.), but the main way to do things in this is to make a banger oneshot to show what you can do and how creative you can be without having to care about publisher desires.

So, I really have problems comprehending how many of them do not seem to get that and produce boring or low quality stuff, either missing the point of the anthology or following the formula to a tee.
What makes them do that?

 

[Manko-sensei]

More than getting a serialisation it seems the type of anthologies that advertise authors from a magazine/publisher to boost the sales while offering a new product instead of putting the first chapter of each title. About the quality itself, I can't bring myself to like any of the stories of that genre (except parodies) so I can't be objective in that aspect. Just consider it as such, self-promo and anthologies made for the sake of selling.