I sort of hinted at this in my earlier response but I think that you are entirely correct to mention this a bit more obviously and up front.
Given that @rhino78 is premed, I am assuming that they are currently taking some premed classes. These classes are likely in many cases to have very tough mid term exams and very tough finals. It really is important for a student to put in the effort and keep ahead at all times throughout the semester (or quarter) and make sure that they are fully ready to do well in very tough exams. Do not take these classes for granted regardless of whether you are at a top 10 or a top 200 university or LAC. Plenty of students will be unpleasantly surprised at some point.
I have heard multiple examples of premed classes that were full of very strong students with mid term or final exams with a class average in the 40’s or 50’s. The students who got an 80 or 85 or 90 on these same exams are the ones who get an early leg up on admissions to medical school (or a very good PhD program or whatever route they decide to take).