You somewhat seem to miss the wood for all the trees. The problem is the curve - grading on a curve is inherently unfair and irrelevant. Why should it affect your grade if others in the class cheat/struggle/..?
Any teacher (and school system) worth their salt has by now dropped grading on a curve.
Maybe not a literal curve, but tons of instructors will compensate if an exam ends up being too hard (or too easy). Except the main way they tell whether the test difficulty was off is by looking at the grade distribution which obviously ends up skewed if some people cheat
Any teacher (and school system) worth their salt has by now dropped grading on a curve.