It's not about having expertise, it's about being certified as an expert. There are lots of people who have worked in industries for decades and are literally experts due to experience, but they can't teach that subject matter at a university because they're not certified.

On the flip side, we have people who have never worked in industries and have no real experience, but have studied it from the universities, teaching their ideations as if they're derived from real experience and reflect reality.

We then act as if universities are the centers of knowledge, and push people to attend them to get certified themselves. Then we all pretend as if certification means something.

This clip from Back to School isn't far off.

https://youtu.be/uSLscJ2cY04?si=vem6Hoi5PzFFGinb