And we're Darwinian for different reasons too. Some of my practices are "organic," but only because I don't have time to spray insecticides and fertilize with commercial fertilizer. I have a full-time job and a big garden. The roses can either live under those conditions or die.
Nurseries matter too, I think, especially when they change hands. I have some spectacular roses from Edmund's in my garden, but all four from my latest order two years ago are icky. They looked fine when they arrived and they're planted in different parts of my garden, so I can't blame their bad health on growing conditions, but they just are never going to be spectacular. All of my S&W Greenhouse roses look pretty bad too -- every single one. They eventually will have to go to make room for something that grows better.
