This happens quite frequently in engineering. They want you to take “their” math or “their physics” which by the way is always much harder then their AP course. Every engineer told me to have my son retake Calc from 1-3 100% of them. He had Multivariate in high school so Calc 3 and got an A in it. His Michigan counselor told him the same. He told me afterwards that it was not easy at all and he is a known “math” kid. But got a great foundation now and it proved out. Not grade grubbing at all. Plus, some kids don’t do well with the AP format. For whatever reasons it’s a bad format for them.