Communication is often a balance between brevity and clarity, especially online where readers are already overloaded with information and have short attention spans. Write too little and the information may prove insufficient, but write too much and the reader may lose interest.
The descriptions on GrahamValue are therefore usually a compromise between these two extremes; attempting to try and convey all relevant information in as few words as possible.
Value Investing is also a complex subject, and there may not even be any simple ways of communicating such complex ideas.