teaching - Are learning by reading from a textbook compared to listening to lectures different roads to same goal

I have seen few people who learn better(or mostly) by reading textbooks themselves in private as that gives them more time to think back and forth about the material. While there are other students who are quick at grasping things transmitted orally like in a lecture and despise reading it through books. Few of the former even have this habit of not being able to learn at all sitting in a class as lesser time is devoted to discussion on a particular topic and the lecturer tries best to move to the next topic as quickly as possible(not always though). So should those who like to learn on their own through books be guilty for not attending classes(mandatory like in bachelors or masters programs) since they are anyway not going to assimilate much and it will be waste of time?