Why didn God just hide the Tree of Knowledge?
First off because it’s a myth, a story — & having the Tree of Knowledge of Good & Evil hidden would not have served the intent of the mythographer(s who created the story. Some of the basic questions being dealt with, when the story was written were of the nature of: Why do we have to work so hard to stay alive? Why are there thorns that rip at our flesh when we try to grow food, plagues of grasshoppers that wipe out our crops? Why do women have pain in childbirth? (Surely, by that time, sheep & goats had been observed *not* to go thru so much pain as human women did.) Why is there evil in the world? Why do people die? What’s the meaning and purpose of our lives? The myth provides some degree of answers to those kind of questions. Reasonably intelligent people, now-a-years *should* be able to give far *better* answers to those kinds of questions than the creator(s of the Garden of Eden myth — but for its time, even with its patriarchal bias (devaluing the Divine Feminine — the serpe