> I don't see what it has to do with for loops or operators specifically.

The reason that these operators pull their weight in C is because iteration over arrays is achieved by manual incrementation (usually via the leading clauses of the for-loop) followed by direct indexing. Languages with a first-class notion of iteration don't directly index in this way, which overwhelmingly eliminates not only the vast majority of array indexing operations in codebases but also the need to manually futz with the inductive loop variable. Case in point, Rust doesn't have `++` in any form, and it doesn't miss it, because Rust has first-class iteration; on the then relatively rare occasion where you want do want to increment, you can do `+=1`, which doesn't have the footguns of `++` due to assignment being a statement rather than expression, while leading to a simpler language due to leveraging the existing `+=` syntax rather than needing a whole new set of operators.