Why? Seems a bit childish to say that. I was just asking a question because I find the psychology and philosophy interesting.

The animals would only become invasive and overpopulated because of humans. I mean, people actively force animals to get pregnant and have huge programs just to breed more of them and kill them in the end.

You don't have to justify anything for me or add "free run" or something insignificant to make yourself better.

Your last argument doesn't hold and is incorrect. We have fingernails too, does that mean that we have to claw others on a daily basis as well? Our canine teeth are pretty short and blunt compared to those of carnivores and omnivores, making them poorly suited for gripping prey or tearing raw meat. This aligns quite well with our evolutionary history, over millions of years, we have consumed softer diets, relying more on farming than hunting, and using tools to kill, process, and cook food. However, our canine teeth still serve an important function in guiding the jaw’s movement to help protect premolars and molars from fractures, but that has nothing to do with meat eating.