I think you give too much credit to intentionality. Human goals run more along the lines of hoarding, laziness and comfort/gluttony. When these encounter obstacles, they find clever ways to avoid risks and discomfort (often by employing other people to do so; reaching the point where monetary systems establish what passes for intent) or to eat things that no sane animal would eat.

The wild pseudobalance of natural systems tends toward a net usefulness (Schroedinger's "anti-entropy") while civilization drives full on at a net consumptionism (landfills and environmental contamination). Civilization doesn't have a goal; only a consumption relativity (war, competition, growth) in an ongoing work/risk-avoidance process.