The overall GPA should count towards admission, though. So even if theoretically a C is good enough for them in any of the required courses, if admission is at all competitive, the better you do, the better chance you have of getting in. So if you retake a course, I am assuming that the old grade does not count toward the GPA.
Still, college is expensive, re-taking classes will just push off graduation. If there is one course that you messed up on for some reason and you think you could do much better a second time when that reason does not apply, and it does not delay graduation, then ok. but if it is multiple courses, and the courses will be hard even the second time, I don’t see much point in repeating.