"This struck me as a cool way to start a game. Rather than heading out as someone already au fait with society and its norms, your character is hopelessly lost and so are you."
Such a cool (and convenient for the writers) way to start a game, in fact, that it's been done to death thousands of times, and is such a tired cliché of game writing that it has its own page on TV Tropes, and is considered a sin on a par with "and then he woke up and found it had all been a dream".