Passion for wildlife shouldn’t override progress, survival of human race

I am amazed at times when I read about freedom of animals. Contention is that all animal life should be free and not encumbered in any manner shape or form. I can understand some of the reasons even though I do not always agree.
What would it be like if all the horses were allowed to roam as they want? Remember, there were no horses or similar animals such as donkeys, burrows etc. in America before discovery by Columbus.
If cattle similarly were turned loose, where would we get the . . .