It is funny people laugh when they hear me bust out into Arabic in front of them. I told them I am a language major by trade, and did IT in college to make money. Many people congratulate on mastering these "magical bodies of knowledge that are witchcraft, because surely I (the person I am helping) could never get it." If you want scary, these are other people married to Arab men and women, as am I. Decades of exposure mean nothing.
Now why is that? Grades breed mediocrity. Good students stroke their ego, and most students give up when they cannot compete with good students. So we encourage people to believe "I am a magician that speaks computer" and "Arabic is impossible" (if you beleive that, try teaching and explaining inconsistent English grammar; Arabic has encoded in the morphology a lot of syntax that would scare you into seeing what is like a human programming language) and accept mediocrity because evaluation and rank is more important than effort. I see it so often, even from students, I mess with them when they come to my office. I never bitched to change my grades. Why? I was busy reading. Who cares!
Please keep being that professor, I hope you save some of them. What is the most cautionary part of that tale is the people in my story all end working for government, some as counter-terrorism and intel guys. They cannot string a sentence together in Arabic, despite the A, and dictate USG policy "on dem terrorist A-rabs" so this culture will get us a real far.
It matters a lot when student wants to study medicine. Law firms look at grades when selecting graduates. If you want to go to grad school, your grades matter a lot too.
So, in a sense, grades are real competition.
So, I had a great teacher. He did not care about grades at all. He would give bad grades, and when kids would complain give them good ones if they wanted to retest. He would play games with students regarding this. Now the students who wanted good marks to count towards proficiency were really pissed. He put it quite simply: "I'll give you all the A's you want; but when you go back you will still not speak the language. I do not really care and that is not the focus of my classes. I am here to teach and discuss the language and material with you. That is what interests me." I was one of the few that enjoyed that course, and I was admittedly the best student. I continued to be a strong student in all courses, even those I failed (like economics and computer science) because I was far more interested in material than grades.
In the end, I graduated with a high GPA. I see this as a cautionary tale. Now if only I could finally learn C and submit kernel patches like I promised myself in college. But such is life.