if i am at a casino and dealt a mixed hand of low cards, it won't do me any good to assume that i should have a winning hand, make up my own rules about what each card is worth and argue with the dealer that all the chips should be mine.
i play by the house rules.
you may think that the argument that God is sovereign is weak and doesn't satisfy your reasoning. but this is that Job received; this is the answer that Jonah received, and that Jeremiah received, and others: the potter is free to make the clay into whatever sort of vessel he likes, and clay that will not form to the potters intention is thrown away or melted down in the slop bucket until it can be remade.
that's the house rules.
if some mud wants to understand the potters intention, it must suffer through having its air bubbles kneaded out, being spun around on a wheel, pushed into shapes it doesn't understand, having bits of it cut away, and dried out completely, covered in glaze and baked in the hot kiln for a long time, where its internal structure is changed and it becomes hardened and strong. funny thing about glaze; it almost always looks like some muddy taupe color before it is fired, no matter what kind it is - you never see the beautiful color it becomes until it's been changed by the fire.
if i want to make a cup, the clay will never know what sort of wine or water i want it to hold until it has 'suffered' all these things.
what the clay calls suffering, the potter calls the process of creation.
if the clay won't accept my kneading, and keeps an air bubble, when it comes time for it to be completed in the kiln, it will be destroyed, and anything else around it in the kiln will also be ruined.