...People have bought into the idea that aliens are undesirable only because of their invasiveness. If you say it is not invasive, then (they reason) there is no reason not to plant it. How many talks have we attended where big names stand up there and tell the audience exactly that. And that, of course, generates all the arguments about whether a plant is invasive, or maybe it's just a little invasive, etc. We are still a long way from convincing people that the plants in their yards have an ecological job to do, regardless of whether they are invasive or not.
Doug Tallamy as quoted in an email correspondence on the Invasive Notes Blog.
This captures the essence of the book I recently read and wrote about here quite well.