I agree, but for the sake of my oCd/realism, as clark, it's way easier to keep a comb in his pocket and look after his hair during the office hours - then once he changed out those clothes in super speed, flying around the city, lifting and throwing, his hair will naturally fall down and create the classic superman look. After all, have you ever put your head out of a car window and it not stay the same?
It's like in Superman Returns, the sea plane scene, Clark's hair in the suit looked great, wet, slicked back, but falling over his eyes, that was way better than the cemented wig he wore.