It's well-known among economists, and often known by politicians and even journalists that employment is a lagging indicator. When the economy sinks, jobs are lost a few months later. When the economy recovers, job creation is often the last step.
Why, then, do journalists and Keynesian economists insist that demand drives business cycles? How can consumer demand increase while unemployment is high? Something always ends recessions; we've never suffered a persistent recession. Even the Great Depression didn't "bend the curve" of long-run growth.
There are a lot of mysteries in economics. It shouldn't be a mystery that the economy will recover, and when it does, it won't be because of consumer demand rising unbidden like the sphinx.