You're not wrong. I just finished reading "Make It Stick" which covers these topics and one of the many examples from college lectures is a student who was doing the readings before the lectures.

As you point out, asking questions is useful, and trying to answer them yourself first is even more so. One student classification researchers have identified is rule vs example learners. Rule based learners seek out rules to learn something, while example learners typically try to memorize examples. Rule based learners tend to do better in scholarly tasks / exams. However, example based learners can be taught to be more like rule based learners with a few hacks: prompt them to compare different examples, instead of reviewing one example at a time, inserting questions into the marginalia / chapter headers, etc.