Hawking Radiation has never been observed so we don't know if it's a real physical phenomenon but if it is, it's that weirdness at the intersection of relativit

Hawking Radiation has never been observed so we don't know if it's a real physical phenomenon but if it is, it's that weirdness at the intersection of relativity and quantum mechanics that makes it a phenomenon worth naming. QM is chock full of these caveats, especially at the event horizon, and Hawking Radiation is an extreme example.