That is true. But finding out those numbers is a much bigger problem for you or I than it is for a national government that can dedicate full-time research sta

That is true. But finding out those numbers is a much bigger problem for you or I than it is for a national government that can dedicate full-time research staff to producing sensible estimates. So a benefit of this policy is that environmentally conscious private citizens no longer need to feebly grapple with such questions. You and I just optimize for personal expense and our own happiness while computing the carbon footprints of various things is the responsibility of institutions that actually have the resources to do it.