Maybe climate is in absolute equilibrium. Warmer climate opens new areas for living. Just look at the globe - there are much more land in the north than on equator.
Destroying the environment in order to expand our use of resources is not an equilibrium.
We've never been in equilibrium. We've continuously expanded at the expense of other species. It's just that now the limit of this expansion has become very visible
I suspect it's a matter of time. However, from what I've read most of the soil in Siberia is very poor for farming, so I guess there won't be much food production coming from there even if the climate becomes warmer...
If you really want to, soil quality can be fixed with heavy machinery and chemical fertilizers. But the new, warmer climate isn't particularly stable yet, so it's probably not wise to pour too much resources into that mega-project at this time.
We've never been in equilibrium. We've continuously expanded at the expense of other species. It's just that now the limit of this expansion has become very visible