Certainly pay attention to the other people who replied. You don't want to lose the stron incentive for students to enage with these quizzes.
One thing you can do, for a student who missed out for a good reason (e.g. they were ill for a whole week) is to use user overrides https://docs.moodle.org/35/en/Quiz_settings#Group_and_User_overrides to change the close date for one particular student, to give them another change to attempt the quiz.
There is also a long-standing feature request to let students see a review page even if they have not attempted the quiz: MDL-20329. That would be a useful addtion.