I don’t think everyone should get an A in every class. But say you are teaching Calc 1 and you are a great teacher. The test is on Calc 1 material. You don’t put Calc 2 level questions on it which advantages kids who are retaking it even though they took Calc BC in high school for the easy A. Why shouldn’t everyone get an A if they all get the question right.
Isn’t it more important that kids learn the material we want them to learn in a course, than to sort them?
My son had a second grade teacher who got every kid in the class reading above grade level by the end of the year. He was the only teacher in the school to do that. He was amazing. I ran the Reading is Fundamental program at the school and every single kid in his class was excited to pick up a book.