All hyperbole is totally useless
Sure, it gets people's attention, but does it change minds?
Hyperbole needs to be hooked up to a story in order for it to make a difference. A story that resonates, that matches our worldview, that holds up to scrutiny.
Hyperbole can open the door, but it doesn't change behavior. Persistent stories that are true, amplified by the tribe... that's what changes behavior.