They don't care they are there for a week or two and kill the grass with their mat. next year they may come back and put their mat back down as usual, killing any grass that has come up.
Everyone else gets to experience the mud hole and the mud splashed on tires and wheels and wading it into the coach and back out to the car and muddy shoes they must clean and steps an sometimes into the coach. A good grassy site stops all that but these city people want a living room outdoors and probably never experienced thick lush grass between their toes, or clean wheels and tires, I get older cleaning those things is a chore. Last trip I put lengths of plastic carpet runner next to tires and stopped the splash butt could not enjoy outside under the awning or get to a grassy area because of the mud!