In the world of pollinators, a manicured grass lawn is like a desert, there is nothing there for them. That means that those nuisance dandelions become oases, precious sources of pollen and nectar in a field otherwise devoid of food sources.
A grass lawn is a monoculture, an area where all plants in an area are the same species. Monocultures greatly limit the number of wildlife species that benefit from their presence, which is why if you want to support native wildlife, you want to get as much of a variety of native plants as possible, both grasses and flowering plants. With multitudes of pollinators using your lawn as a resource, flocks of birds will then also arrive, keen to eat at the buffet you've created for them.
By maintaining native grassland habitat, we are creating a space that is attractive to birds like Painted Buntings and Northern Bobwhites. By starting with the ground up (or rather, the roots down of native plants), we are supplying entire ecosystems from producer to apex predator with the resources they need to continue thriving in the state of South Carolina.