I disagree, Pan, I think she's talking about lawns in general. Here's the start of the OP -
I can’t help but think the lawn is primarily a waste of space.
Always strikes me as something people maintain to keep up appearances rather than something they actually want.
For most people it is not a waste of space or for appearances, it is a practical and busy area.
Pets, children, washing lines, climbing frames, paddling pools, football nets, swingball, badminton nets, sand pits, tents and play dens, lawn games... a lawn is the most used part of a garden for very many families. I like a game of petanque myself, even if the lawn isn't terribly flat)
It needs mowing maybe once a fortnight (except for May, when no one should be mowing), there's no watering, feeding, weeding, pruning etc, so it is far less work than deep borders filled with planting.
I am lucky enough to have space in my city garden for a lawn, mature trees, fruit and vegetable garden, shrubs and a long grasas meadow patch, so I do value diversity, and sustainability. But I'd not write off the value of a lawn, especially for those with younger children.
Yes, OP goes on to mention mono-culture titivated lawns, but those are vanishingly rare these days. Bowling green lawns can't cope with climate change. I don't know anyone who strives for 'perfection' in a lawn.