I'm well aware of the disdain (see Garden Rant) and the rhetoric (see Michael Pollan).
I'm not sure people care all that much. Like Rex said, it's pretty, and it's spread appears incremental, hardly noticeable. The government has policy, it is a known invasive, it is illegal to harbor it on private property (this is where tongues tingle with politi-lingual fascism), and it's hard to control. And maybe, maybe, an appreciation for rarified things in life is an elitist affair. And maybe people, humanity, has a thing for the strong, aggressive, and adaptable in life. Maybe.