Not saying I agree with it, but: A frequent answer to that from proponents of a strong unitary state (e.g. China, but also Russia and a few other countries) is

Not saying I agree with it, but: A frequent answer to that from proponents of a strong unitary state (e.g. China, but also Russia and a few other countries) is that society there is too divided for the state to survive without a heavy hand. And then, once the state breaks down and the country splits into fiefdoms ruled by warlords, the collapse of infrastructure and violence means that the average person wouldn't be getting much benefit from modern technology. Just look at Somalia.