[hollandheese]

A professor's lecture notes would never be good notes for a student to learn from. They are simply reminders to the professor to talk about certain topics that they know the ins and outs of.

Half the time my lecture notes consist of a couple of problems to use as examples and nothing else.

[bee_rider]

Agreed that the notes are usually not so great for learning from. But in this case the “notes” are actually the slides, which are explicitly intended to be consumed by the students.

[shiandow]

Even so, a set if slides is a great reminder of whatever the professor talked about.

[elicksaur]

This is conflating written jots with information presented to the students.

The author is talking about PowerPoint slides that were presented to the students as valuable information.