as far as your argument about trees goes, it's very easy to get a large amount of hardwood for charcoal to smelt iron with
the smelting is the only part of crafting metal that takes any time at all.
You can ignite a forge with a single piece of charcoal and make a couple dozen items while you have the smelters and kiln going across from it
Typically we smelt 80 ore at a time with 20 charcoal inside, since an ingot uses 20 ore each, and all this takes far less time than a typical hunt.
Should also be noted that even if you were in an area void of trees and had to go elsewhere for them, that you have only yourself to blame for not having sprouts planted and growing, since they can be placed down and ignored.
Rabbits die if you ignore them, and hunting is a long winded expedition on it's own, not to mention possibly dangerous since wolves seem to have titanium teeth and wear plate armor given their ability to heavily wound the members of my hunting party.
long story short:
Spoiler
trees dont kill people for trying to find them