I suppose if you completely reject all urbanization, you kind of have to reject the idea of global warming to justify all the car use needed for everyone to live in rural areas.
While I don’t agree with SS27 about global warming, or that urbanization is inherently bad (plenty of people choose to live in cities), I do think landscape architects should be more involved with urban planning. We need more small parks and open spaces spread more evenly throughout the city (rather than only having large chunks of open space in a few wealthier areas). We need better streetscapes. If more people are living in cities, we should be playing a part in making cities nicer places to live.