Xbox Live matchmaking was easy, sure, but before it became the norm on PC self-hosting servers was far more common, and there was something about the culture of a well-admined server that automatic matchmaking could never replicate – and in my opinion gaming as a whole is worse for losing that. Anonymous and unaccountable public lobbies give so much more leeway to assholes than you could get away with on a clan-hosted server.
For China specifically and at the present time this is true, but China is investing heavily into solar and other renewables that will shift its energy mix dramatically in the coming years. Not to mention that even now, it’s still a net benefit to centralize that fossil fuel consumption into plants that can burn it more efficiently and with better pollution controls than are feasible on cars.