The scrum guide is also like 16 pages, pretty simple and anyone could read and understand it in 20 minutes. What's surprising to me is, these processes are act

The scrum guide is also like 16 pages, pretty simple and anyone could read and understand it in 20 minutes. What's surprising to me is, these processes are actually well defined. But my suspicion is that that's not what sells. No "aspiring manager" will take the "scrum class" if it's ideas are really pretty simple and not that revolutionary and hard to understand. I have come across so many managers who have had a vague idea seemingly from a few youtube videos (or perhaps a class they took) but they seemingly never had researched in the same way software engineers e.g. read API documentation. The same is true for the waterfall model too these days though. If you fully put in the time and actually research these things as am engineer, a lot of managers will feel threatened and stop that in its tracks.