Not having sub-governance would be like anyone who owns USD being able to walk into a Google shareholder meeting and voting without owning Google stock just because Google shares happen to be denominated in USD.

Tokens align incentives between developers, contributors, users, and investors. They allow everyone who wants to contribute to a project early the opportunity to get in on the ground floor.

Ethereum may make monetary policy decisions like, 'Let's do 1% inflation to support the ongoing development of the Ethereum protocol.' A token built on Ethereum might want to do the same.

Fred Ehrsam Quotes