Convince me that positive polarization and balancing isn't about happiness for $100

[anagogy]

Will not the 7th and 8th level inevitably return to identity when a new creation is formed?

Depends how you look at it. From the 8th level, there are no levels. All the things we perceive as reality (i.e. forms, structures, appearances) only exist from the outside looking inwards. From the place of infinity, none of that stuff exists in separation, so it doesn't stand out as an apparent reality.

In other words, our illusory appearance of separation has absolutely zero impact on the absolute infinity that is the 8th level. We are like solid ice crystals of varying sizes forming in a vast supply of water, but at the upper levels everything is still liquid. The form we take: solid, liquid, gas, has no bearing on the fact that everything is still h2o.