The number of high schoolers who might be ready to go into postgrad programs is very small.

There is no way this could be the “biggest flaw” in higher education today because the number of people possibly impacted is so tiny.

Although I think you’re striking at something that is a real problem with undergraduate degrees today: Many universities have become so watered down and softened that students spend the first 1-2 years doing what they should have been learning in high school.

My friends who still teach at university constantly complain about students arriving for undergrad with very poor writing, communication, and listening skills.