I also personally find the "reading between the lines" approach useful. Propaganda pieces often contain interesting stances, useful facts omitted in publications with different stances, and in general are just an interesting window into the thinking of people from a different background.
Over-specializing in any one silo of information makes you vulnerable to manipulation. Spreading your portfolio among many sources lessens your exposure and risk. There's also something to be said for reading a wide variety of sources, including propaganda, to develop your critical muscles, and improve your resilience to manipulation. The more exposure you have to it, the more you can see how it operates, and ultimately free yourself from it.
A sort of "conscious consumption" if you will, haha :).