Are humans and animals better off with bacteria that causes disease?

Answer 1

Humans are animals. All animals would be better off if there were no diseases caused by bacteria.

Most bacteria do not cause disease and some bacteria are useful and even essential to the continued health of the animals they live with, on, or in. However, some bacterial that cause disease do so because either they get out of control in the body or the body suffers a setback or imbalance that then results in disease, when those bacteria would not normally cause disease.

To eliminate bacterial disease without also eliminating beneficial and necessary bacterial seems an impossibility.