I don't understand the argument that generic diapers "don't last as long." Every diaper lasts until it's soiled; it's not like the generic brands absorb one poo

I don't understand the argument that generic diapers "don't last as long." Every diaper lasts until it's soiled; it's not like the generic brands absorb one poop but you keep the "better quality" diapers around for three poops, as though they were paper towels. The only reason I can think of that they wouldn't "last as long" is if you have defective diapers that you have to toss before using (only happened to me once or twice in 2+ years of using Target/Walmart brand diapers, hardly significant). There are other reasons to buy more expensive brands (fewer blowouts, less diaper rash, odor containment, sensitivity to materials, who knows depending on the baby) but I don't see why usage volume is one of them.