I'm just asking why?

Hello, scl^mc the context is this: it is clear that completely similar bottles are not needed, but regarding Are there any criteria for “homemade” bottles? those. let's say we can assume that Spectrum Nabigator, FC, etc. Of course the bottles are cool, there’s no question whether they’re needed or not no, but what about the others? those. How to weed out outright garbage?