People can make mistakes when reading/writing code, around the ++x (pre-increment) or x++ (post increment) operators.
pre-increment:
int array[] = {0, 1, 2};
int i = 0;
printf("%d\n", array[++i]); // prints 1
post-increment:
int array[] = {0, 1, 2};
int i = 0;
printf("%d\n", array[i++]); // prints 0
By removing the possibility for that kind of confusion, the opportunity for the mistake is removed