Thanks for the reply! I didn't mean to criticise the book, was just complaining about the real world issues of Humanocentrism.
, Earth is a newcomer on galactic politics but I can see why it ended up as the centre of Starfleet and the UFP government: Peace between the Vulcans and Andorians, the most powerful members of the Coalition, was recent. I doubt whether the Andorians would've liked to yield to a government situated on the world of their former arch enemy. It's like having the EU captial in Bruxelles instead of Paris or Berlin.