Yes, it’s a joke. For sure, some day we’ll get hit. And soon, in astronomical terms. But “soon” may mean 25,000 years or more. The odds of us getting hit on any given day are infinitessimally small.
Or it could be tomorrow. No way to know.
“While rocks raining from space are scary and there is no way to completely eliminate their threat, they are also thankfully sporadic. Your odds of getting killed by a meteorite are roughly 1 in 250,000. You are far more likely to die in an earthquake, tornado, flood, airplane crash, or car crash (but less likely to be killed by lightning). “