It serves the people whose houses are burned and the even larger population who has to live in smoke-polluted air for days or weeks at a time. The prize targets extreme wildfire events, as it says explicitly. Not one of the prizes relates to quashing anything, it's all detection and tracking.

Then someone should probably inform their copywriter that "End Destructive Wildfires" is not an accurate framing of the goals. More like "End Community Destruction By Wildfires"

The copy is fine, because it's not intended for consumption by robots who cannot derive context. Anyone unwilling to read the entire front page, which contains specifics as to the type and scale of wildfires targeted, is unlikely to either find much success as a contestant or otherwise have a meaningful impact on either the xPrize or wildfires.