The tree of knowledge of good and evil is basically the tree of knowledge of everything because almost all things are subject to good and evil just as you have shown above with breathing
No, the Tree of Knowledge was granting the ability to determine or distinguish between the two. A baby doesn't know good from evil, or to put it another way, right from wrong, however, it can still do bad things.
Or perhaps you can look at it yet another way. Evil requires malice aforethought, if you do something bad and end up hurting people, but you didn't intend that to happen, nor did you think it would happen, you're not evil, just ignorant.
Basically, I was trying to follow your logic to its obviously absurd conclusion. The fact that you found the conclusion not only not obsurd, but actually persuasive means that I'm not sure we'll ever be able to explain to you why you're wrong.