When the environment changes, whether through activities of man or activities of mother nature, some species thrive and increase in number, some go extinct. Some adjust and just get on with it. Maybe their food or range changes.
Yes, passenger pigeons are extinct due to man. There are more deer in North America now than there were when Columbus sailed, due to man changing habitat. Change is normal for mother nature.
Mother nature abhors a vacuum. If one form of life dies out, she'll fill the void with another. She doesn't care if that is mankind, deer, grasshoppers, or microbes. Life is life and she doesn't care. Eventually something will change and something else will move in. As part of mankind I do care. I want my granddaughter to have something when she is as old as I am. Getting all mystical and mythical about Canada geese is not going to keep mother nature from making some management decisions if their numbers become unmanageable, whether in total across the world numbers or in a microenvironment where they just get too crowded. In my opinion, keeping the numbers within manageable limits makes the flock stronger and our environment cleaner.
$60 for a goose! Wow! There is a lot of waste there, which also rubs me the wrong way. I'm sure lots of people would eat them if they didn't know where they came from.