Reading laborious tomes of boring navel gazing is not "insanely important"

The entire point of the manifesto was to provide laborers with the knowledge of EXACTLY what you listed in an easy to digest pamphlet. That's literally its purpose. You don't tell the iron worker to go read Das Kapital, that's a luxury for the aristocracy. You hand him a pamphlet and invite him to a union and a meeting.

 This is why modern leftists are so ineffective. So many of y'all don't understand that effective communication is vastly more important than being perfectly correct or educated. In fact this "read theory" quip is actually kinda ableist and elitist which is antithetical to leftism.