Take a common real case: a family leaves for a weekend, a pipe bursts, and a water sensor shuts the valve and sends an alert. That's thousands saved and mold avoided, no hacker required. My opponent is right that the network expands the attack surface, and I won't pretend otherwise. But the comparison isn't perfect security versus smart security; it's smart security versus the safety devices most homes actually have, which is often a smoke alarm with a dead battery. The threats that reliably reach a house are fire, water, and break-ins. A remote entrance into my life is a real cost, but it's abstract, and flooding is not.