Pdf to flashcards from dense slides? What are you guys using for dental boards?

Our professors upload these insanely dense pdf slides with like 90 pages per lecture and I need to turn them into something reviewable for boards. Right now I'm reading through the pdfs, highlighting stuff, and then manually typing flashcards from those highlights in anki and this is not working. Its taking forever and Im falling behind on reviews cause I spend all my time making cards instead of studying them.

Is anyone doing pdf to flashcards in a way that doesnt eat their entire evening? Especially for the anatomy and pharm heavy lectures where every other sentence feels important.