The narrative says there was a place called Eden or being eden (a watered valley) and then God planted a garden inside of it where Adam was placed.
Why was this place a garden, and not a city, a village, a field, a forest, or a manor, or a farm? IIRC, the word גן does not appear in the Torah outside the story of Eden, so it is hard to understand its true meaning (Even-Shushan dictionary derives it from Akkadic "fruit garden") but I'll assume it IS a fruit garden. After all, it is a public place (angels and God were there also), hence my other question "did-adam-and-chava-have-a-house-in-eden", it should be free of wild animals, otherwise, it would be a forest, etc.
Was it a garden only to promote the narrative of the forbidden trees or was there another reason it was a garden?