When I read the article I thought there are likely other nests nearby. Perhaps they should use some of the forestry budget to do a controlled burn in the area. It'll reduce severity of future fires and get any of any hornets nearby ;-)
If there's evidence of multiple other hives in the area, a controlled burn may get some of them, but the scope of the fire necessary could also be massive.
I'm not saying the option shouldn't be part of our arsenal. And if this is an area prone to wild-fires, then as you said it could assist there as well. However, I'm not sure it's a good option at this time, especially considering the side effects on other local indigenous species.