What are your thoughts on notetaking /sci/?

Jordan Peterson thinks it's a load of crap while I've seen people advocate taking notes for reading through fiction books for pleasure.

Pic-related is football manager Jose Mourinho, who is notorious for taking notes during football matches. In the old days it was very rare and often perceived as amateurish and a sign of incompetence, but when Mourinho started to do it a lot it turned that theory on its head and now it's not such an unusual thing.

There can be no doubt that taking notes will help jog your memory of important terms and therefore the person who takes notes will do well on say a test where you need to know medical terms. However on the flipside, for ideas, your brain should be organizing and sorting the important points by itself. The brain is designed to remember what's important and forget what's not, taking and learning just the notes seems and easy way out. You can't take notes all the time in every day life. If a person has to write down everything I say, I'm going to think of them as incompetent. Plato believed that the written word was a bad idea as it made people forgetful. In the end you're going to end up with loads and loads of notes and have to go through them anyway.

So what are your thoughts? A good idea or an unnatural perversion?