Definitely not everyone is a min/maxer. There are a lot of very casual players. Players who sit down, pick up a pre-gen character, and go. Who have done no work to min/max ANYTHING on that character sheet, other than make up a name. This is not at all uncommon. It's the format for most games (board games, card games, etc.) and they're often at a game store sitting down to play a game which, in their mind, really isn't that much different than any other kind of game. They expect to sit and immediately start playing, and they can do that.