First of all, we are all familiar with the "Options > Multiplayer > Game Mode> Offline/Invite Only/Friends/Public" setting in the main menu, correct?
No. Most people just play the game. Some go through the options beforehand, but many don't. Some people just check the options when they need to change something (controls or volume, etc) but otherwise just want to play, and a button to do what they want is much easier than a list of instructions on how to change settings to be able to do what they want.
Which, fortunately, is why we have a multiplayer options button sitting right on the UI next to the minimap, again making the "new game> singleplayer/multiplayer" choice pretty redundant.
Personally, I would be surprised if most people did not head to options first to customize graphic settings and/or tweak keybinds before launching the game.
