There are still preferences and simply positions that have to be played with then define the playstyle you will have on the map. I.e the cat player is usually an aggressive player while the B anchor is usually passive or supportive in nature.
You can but players have preferences i.e roles. Its much different being a site anchor to a mid player and players recognize that. Just like it's much different being the entry on t sides to a passive player or lurker or AWPer