Scientists and mathematicians already spend an extreme amount of energy trying to think of the shortest, cleanest possible route for people to learn their field

Scientists and mathematicians already spend an extreme amount of energy trying to think of the shortest, cleanest possible route for people to learn their fields. The resulting documents take years to create, and are called textbooks. (At least, the good textbooks are like this.) Often people will work for thousands of hours on their books, essentially for free. Students go from outsiders to participants by reading them, all the time. The problem is that things genuinely are hard, and there's only so much compression you can do before you're reduced to meaningless handwaving. Textbooks are already compressed by a factor of 100 relative to the original research literature, sometimes even oversimplified. Demanding something a factor of 100 better than a textbook is going to get you something like one of those useless "learn C++ in 24 hours" paperbacks.