People a few hours away can have different cultures and languages, but you think people literally months away from each other will somehow be more united? Why?

People a few hours away can have different cultures and languages, but you think people literally months away from each other will somehow be more united? Why? How much in common will a third gen asteroid miner who can die if his environmental controls so much as hiccup have in common with someone living in a functioning biosphere? A coal miner and s Wall Street banker already see each other as practically from different species, just wait until they more or less are.