There is a big difference between a jungle and a garden.
Gardens have gardeners. Jungles do not. In the jungle, vines and weeds grow everywhere, sometimes strangling new growth and keeping desirable plants from blooming. Trees you don’t want block the sun from reaching those you do want. The root systems of vegetation that produces nothing useful suck up water needed by fruit-bearing growth. If you want a garden and not a jungle, it won’t happen naturally. Somebody has to tend it.
Eden was a garden, not a jungle. Those “somebodies” were Adam and Eve.