I'll stick to the plants growing happily in my postage stamp garden, thanks.
Seeing as most of the homes round here have concrete, plastic grass or no garden at all, it's good to have somewhere for insects and birds to nest and feed.
I'm allergic to half the plants out there, so will come out in massive wheals, my eyes will burn (they're dry as hell anyhow) and I'll be itching all night if I do anything remotely resembling cutting it all down. But it looks and smells beautiful and to be able to sit and watch twelve different species of bumblebee, honey bees from the allotment a mile away, multiple other solitary bees, lacewings, butterflies (especially Red Admirals and Peacocks that need nettles to lay their eggs on) instead of dirty grey is good for the soul.
The Birch, firs and Red Horse Chestnuts would get me in any case, followed by oilseed rape from about 5 miles away as the crow pollen cloud flies, so obliterating wildlife whilst ensuring that there are no endangered orchids, poppies, yellow rattle, clover, green alkanet, dock, ox eye daisies or ragwort (can't be around livestock but vital for cinnabar moths) or other native food sources alongside the roads wouldn't make a blind bit of difference. If they're a problem for drivers, close the windows, use air con and just look where you're going.
I am horrified at the idea of steroid depots being given outside a medical context, though - they've got very real risks.