People would rather have cheap and easy consumable info and move on. The drive is to be able to respond faster, not respond better. Unless it's an area where people have a specific need to understand the subject, they will rarely read complex topics.

And people regularly fail that too - take a look at success rates on MOOCs, a small percentage of self driven applicants actually finish the course.

It's a human brain problem, not a tech problem. The problem is people and those who know how to manipulate them.

Remember that any new form of forum which manages to make people learn complex topics could just as easil make them learn falsehoods or propaganda.