Your first example is completely wrong. Trees are a renewable resource. In North America, most of the trees that are cut down to build houses were intentionally grown for that purpose and are selectively harvested in a way that preserves the long-term value of the land.
Meh, sort of. Today's construction lumber is nearly all farmed, true. But CITES exists for a reason. The demand for certain woods greatly outstraps supply, and deforestation and smuggling is a real problem that's difficult to solve. And that's even without considering deforestation that's done to open up new farmland.
Madagascar is the obvious example here highlighting both issues, but it's certainly not unique.