The reader might ponder ten thousand intensely personal stories of a search, a search at last successful, for an ecological niche in which, if not to prosper, at least to survive. Go back to sleep. But if headline non-farm is materially away from the consensus, then prices might really move. Financial markets worship Alan Greenspan. If more people are at work, then official interest rates are more likely to go up than the market was previously anticipating.
Financial markets care lots about timing.
This trading is not idle gambling. Those who have been kind enough to lend money to the world's governments, companies and households may wish to reduce their substantial risks. That's a noticeable profit or loss, and the holder of the bond might want to hedge some of that risk. Hence financial markets. The trading floor is quiet, waiting.