Right, if you think your kit doesn't smell after more than one use you're kidding yourselves. If you don't mind that then fine. However, when you go into the changing rooms where your kit is hanging up, if you've used it more than once, then that horrible sweaty smell you think is other people? It's you. It's your kit.
I never ride more than twice in the same kit. Ride to work, ride back, wash. And even then, I take clean shorts and base layer in with me. There's a guy in work who runs every day at dinner time. He wears the same kit all week. By Tuesday the smell is unbearable. By Friday it smells like someone has killed themselves in there by eating a full box of 250 stink bombs.