That's not an argument. You're just naming a game theory concept. A compelling argument would at least explain why and how it applies to this situation.
Decentralisation is the process of ensuring there is no SPF and to minimise unbalances in power.
For instance, in my country, decentralisation would mean we would have independent state law (like the US) and that most of our decision making structures aren't physically and politically centred in the nation's capital. In technology, we can take the Linux kernel maintenance process as an example of how decentralisation makes it possible to have China, US and EU companies funding the development process and using the software without (too much) fear.