A customer who leaves sends two signals. Exit says something is wrong. Voice says what. An agent has perfect exit and no voice, and markets aren’t built for that combination.
Albert Hirschman laid out the frame in 1970, in Exit, Voice, and Loyalty. Organizations correct themselves through those two channels. Exit is blunt: revenue drops, no reason attached. Voice is specific: a complaint names the failing step, the wrong number, the contradiction. Voice is what turns a loss into a fix.
Voice only happens when leaving is costly. People stay long enough to complain because they have an account, a history, something to lose. Hirschman called that loyalty.
An agent has none of it. Switching costs nothing: the next candidate is the next call in the same run. Nothing accumulates, so nothing is worth fighting for. And there is nobody to complain to. A failure is a return value inside its own context, not a message addressed to you.
In systems terms, it’s a client that drops the connection without an error code. Worse, on your side it isn’t even a drop. It’s a session that ended, indistinguishable from a visitor who never came.
The one measurement I’d trust is Kevin Indig’s, from his Growth Memo in July. He ran pricing tasks against 100 B2B products, five runs each. When the agent hit an access error, it fell back to third-party sources 77% of the time. Without one, 17%. That’s exit, quantified.
None of this depends on how much demand agents carry today. It depends on what happens to the signal. Firms improve because someone tells them where they’re broken. For the share of demand that goes through agents, nobody does, so the broken step stays broken and the market has no way to notice.
For any channel you run, ask which signal reaches you when a visitor fails there. If the honest answer is “a slightly smaller number,” you’re running on exit alone, and exit alone never says what to fix.