Yeah, also I don't know if they are biologists/foresters but hopefully they use native or at least compatible seeds for the areas. There are lots of grass types which can become invasive and destroy habitat for the local wildlife if they use the wrong species.

Where I live we just use helicopters, and mostly only because it's mountainous so we want to establish the grass back as quickly as possible before the rain hits and washes all the soil away into the rivers.