Part of the problem writing a tactics guide is the amount of varibles that affect the tactics. So, unless you want to write a monster size book really, you cant cover all the different situation, and perhaps not even then.
Which means that you must simplify and generalise to a degree when wiriting. Which in turn, means that people can point at the article and says XXX didnt work in my game, the tactics you write sucks.
And, the guy would be right, in the sense that the tactics would not work under his circumstances.
A good player understands how the different variables affect tactics used, and adjust accordingly.
End of the day, there is just so much you can learn by reading, learning by doing is much better. Articles can help by pointing out mistakes done and come with suggestions on how to improve them.
Too bad you cant make movies in game in CM. (without 3rd party programs, that is)