Questions & Mysteries How can the 5 Supernova REALISTICALLY win the fight?

Realistically is hardly the appropriate word for that situation since it's clear that the 5 supernovas such as they are shouldn't be a real match for Kaido and Big Mom, and that in many cases the Straw Hats and others shouldn't have been beaten and killed by many opponents such as their Alabasta, Skypeia, Enies Lobby and WCI opponents.