I sit somewhere in the middle of this debate. I have left animals to fend for themselves, I have also taken injured wildlife to the vet, and I have even stopped by the road and ended some critically injured wildlife. At the moment I have a large coastal living in my shed, It ate a young orphaned possum I had "befreinded"' (It was living a couple of meters from my rat cages , so I would bring it a piece of fruit when I fed my rats) Normally the possum would not get any assistance from me. But it was not going to go hungry in MY shed, while I kept cages of well fed rodents feet away. This python is big and old, and while I haven't seen it fully stretched out, I have seen enough to see it has a couple of big almost healed scars (like most big wild pythons) Since it is now in a suburban setting it has more to contend with than nature, So it can live in my shed as long as it wants, and who knows? I might find an alternate place to put my old breeding rats than the bin...
When showing my eldest daughter Willow (5) the python in the shed, I said "he ate the possum we used to feed!" her reply was, oh well now you can feed the snake....