You don't think it is part of the argument, but I do, and believe it is an unavoidable aspect of, and integral to, the issue. The Calvinist claim is that God ordains what man does; good or evil, makes no difference, because if it is ordained and decreed, it must come to pass. That means God will make it happen, not that God simply allows it to happen. However, it is God's will that all repent, yet the Calvinist will say all does not mean all, and only applies to the chosen elect, meaning them of course, and not the whole world, as in, Jesus died for the sins of the whole world. If you have not seen that, you have not been paying attention when Calvinists speak.
The Op has argued that if Jesus died for the sins of the whole world, then the whole world would be forgiven, as if repentance is not a necessary component of salvation, but he will bristle and bark if you point that out to him. Others will say God is weak if He wills something but does not bring it to pass, as if He were a bully that forces people to bend to His will of coming to the knowledge of truth and salvation. I can see a correlation between the bullies that hold this view, and the view itself! To say God is loving, just and merciful while claiming at the same time that salvation is not offered to all, and those to whom it is not offered have no way to be saved because it is not God's will for them, and that God is going to torture them forever after for refusing His non-existent offer to them, is a god of vain and vile imaginings, the monstrosity concocted within Calvinism, and promoted by people who call themselves Bible believing Christians.