Studying doesn't have a one fits all approach in terms of what leads to good marks and what doesn't. This is because it depends on a large amount of factors like memory capacity of the student, their ability in the subject, studying amount, does the student study efficiently etc.
If the method you are using is working for you and you are happy with your results then you shouldn't change it based on what other people are doing. For example, some people like using flash cards, others prefer to write notes by hand, others type notes and some people like yourself don't write them and just go straight to questions.
A lot of students focus too much on trying to determine the "best way to study". The more important thing is not what method you are using to study but rather that you are actually studying and using that time efficiently