For people wondering. The nameless hero is obviously the avatar of Adanos. Adanos being the god of balance, i dont find surprising that he lets its champion serves Innos and Beliar at the same time. Lets not forget we just use the sword, furthermore against its owner's minions
Was kinda the deal in older Command & Conquer the more com yards, barracks and war factories you had the faster your units/buildings was constructed. Tiberian Sun is the exception though