In order to tell it what is important, you would have to read the material to begin with. Also, the tests we took in class were in preparation for the board exams which can ask you about literally anything in medicine that you are expected to know. The amount of information involved here and the amount of details in the text that are important basically necessitate reading the text yourself and knowing how the information in that text relates to everything else you’ve read and learned.

Trying to get the LLM to spit out an actually useful summary would be more time-consuming than just doing the reading to begin with.