Actually, the Earth of Mass Effect IS a fictional place and it is not the home of everyone we know.
That's a fallacy. Of course every place in every piece of fiction is by definition fictional. Of course even real people become fictional when they're used as characters in a novel or a movie. In a way, the Earth of Mass Effect
is not anymore "the real Earth" than the Earth of Sense and Sensibility
is. But the attachment, the feelings of compassion, those that make it possible to feel any connection to fictional characters, are real. The Earth of Mass Effect is
a fictional place, that's true, but it is also
Earth, and we feel a connection to it - except our psychopathic friends - because Earth is everything we know.