Why does anyone leave their home planet or city? [ he sort of shrugs, even as he continues digging through the snow. the cold is starting to seep in, he'll probably tag out and let illya take a turn digging soon. ]

Sometimes they have no choice. Sometimes they are forcibly moved, sometimes they are fleeing. Sometimes it is just the nature of following the work, especially in a shipping industry or factories. Resources, food. War. Travel and vacation.

I find it hard to believe Earth does not have these things, given what I have already learned about the version we live on now.