Some things indeed make sense on a global scale. But if I would have a local problem, I would not like to have to deal with a obscure world government agency (partly or largely run by AI) somewhere far away.
I agree. I don't think everything should be global, but that we should at least have an option for global. Just as here in the US, I don't think the federal (national) government should make all the decisions for my local town, but I'm glad to have them when it comes to interstate commerce and other national problems that need to be resolved.