I don't think anyone would accuse our federal government of being "agile" or able to "quickly enact laws". And I agree that in almost all things getting the rig

I don't think anyone would accuse our federal government of being "agile" or able to "quickly enact laws". And I agree that in almost all things getting the right law is more important than getting a law quickly. However, your insistence that "it doesn't depend on the law" makes me view your whole stance more critically; the answer in complex areas is very rarely "it doesn't depend". There's a bunch of domains where stuff just happens across state lines so frequently that a patchwork would only create confusion. It would be really disruptive if NY made it illegal to drive on gas you bought in NJ b/c NY officials hadn't specifically tested it to confirm that all additives were acceptable; it's easier if we just have federal standards.