I have a friend who values perfect attendance at school above all else. Even if she knows it by heart the class is so boring that she can't possibly learn anything from it, she will still show up in class and stick to the very end, instead of doing something else that produces a greater utility for her. I want to help her "get rid of the mindset of valuing perfect attendance too much". Is the expression in bold idiomatic (NATURAL)?
Here's my two cents for what it's worth:
get out of the mindset that overvalues perfect attendance.
change the mindset that overvalues perfect attendance.