Because dust2 best rush map and rushing on d2 is so good dude. If u get good spawn u really should rush. Pros are doing it, mm are doing it, faceit are doing it. Everytime i play d2 and we dont rush often we always lost the t side. But when i play with a team who wants to rush we always get 10+ rounds. Rushing as 5 is not stupid if u know what u are doing and know how to trade frag and not baiting.