The amount of text needed for any remotely general guide for any specific faction would be more than the libraries of Congress. Despite how shitty the game is, it's that complex.
The guides here are very general and/or very particular. That's the only way to keep it reasonably short and remotely readable without people dismissing them as TL
R. Millions of factors influence the usefulness or valididty of a guide, including of all things the specific map being played.
I also hazard a guess that the majority of people wanting guides are just looking for general guides because they bought the game an hour ago. I'd think that those are hardly the audience that the people willing to write guides on are looking for.
There's also the fact that the majority of relevant material needed to understand the game is already written. I mean, is there more to say about how UKF works? Also, it looks like most people have been playing as Brits just fine without pulling their hair out and spamming Cookiez's inbox for guides.