The way I see it,it’s one thing to memorize stuff and quite another thing to apply your knowledge. Also, life in general can be quite a teacher if you can somehow manage to grasp its lessons.
Beyond one’s first post-college job or grad school admission application, do grades EVER come up in one’s life again, absent a run for elective office ??
Employers/customers/voters only care that you can get done the job you’re applying/running for, and how you’ve performed in similar jobs beforehand, nothing else. Oh, except the Maureen Dowds* of this world, in which case your grades are important only if you’re a conservative or Republican.
*ironically, my freshman year roommate was named Maureen Dowd. Hardly the same person, tho that MoDo was an honors student. Quite unlike yours truly ;)