Is the Custom Steam Workshop Maps for the Game Worlds necessary?

I’d like to know what would happen if the custom Steam Workshop maps for the game worlds were published and allowed other people to create their own maps for one of the game worlds, test them, publish them, and play with those custom maps from everyone else.

But I’m worried at the moment; does it really matter if everyone chooses the Custom Map(s) option, but the game chooses a random custom map only from players who have subscribed to a custom map from their local subscribed Steam Workshop items?