He compares it to when the Romans would send a herald to announce that a new Caesar had ascended to the throne. When that herald preached that “Caesar is Lord!” he was not saying, “If you’d like to try out a new kind of imperial experience, perhaps Caesar Nero is the one for you.”

Likewise with Christ. Christ is not one option among many. Christ IS LORD, and people can choose to submit to his Lordship or not. But, as you say, it is not the kind of choice that we typically use “decision” language to discuss.