Rejecting the local environment - Let's go pink

"The first bunches of commercially-grown Australian peony roses hit the Sydney flower market this week." abc

Finally another pink thing from Elsewhere to brighten up the 'drab Australian bush'. Azaleas and Rhododendron already frame the real estate, now Paeonia will blossom.

It seems to be a heritage of the settlers then and now to hurl exotic plants either intentionally or unintentionally. A huge horticultural industry and the blind eye of regulation are structurally aiding the dispersal of exotic plants.

"…Most gardens reject the local environment." 

Why is this so in Australia?

The mostly female desire for pink might be the need to be in the pink.

Images:
Macke, August, 1910, Azaleas
Manet, Edouard, 1864, White Paeonia
Corinth, Lovis, 1921, Pink Clouds