Monoculture lawns create massive gaps for various bugs that can’t transverse those gaps to eat, hide, breed, lay eggs/reproduce, hibernate for winter - and that impacts all the other species up and down the chain, from birds to microbial life. Mono culture lawns also limit the fungal life, which limits microbial life. Both those being limited along with introducing gaps where there once were highways for life means species dwindle, and that causes other species of plants and animals to dwindle. It’s a fucking massacre of life just to be “fine”. That hardly seems reasonable and fine to me.