There was already an economic war on Iran, which was already killing people and destabilizing their government. Harris would have waited a few more years for the economic war to collapse Iran's government and turn it into a situation similar to Syria, and only then would have started bombing. By then, Iran might not have been able to exert control over traffic through Hormuz.
Harris would have been a better manager of the empire. Instead, we got Trump, who is on track to lose to Iran.