Most DTC brands have a Klaviyo account that looks finished from the outside. Flows exist. Campaigns go out on some kind of schedule. Somebody set it up at some point. But looking finished and performing like a dependable revenue channel are two different things, and the gap between them usually stays invisible until someone actually opens the account and checks.
The more common problem is not a missing tool. It is a missing owner. A strategist plans the calendar, a copywriter writes the emails, a designer builds the templates, a developer wires up the flows, and no one on that list is accountable for whether the whole system actually converts. Coordinating four people to run one channel is slow, and the seams between them are where revenue leaks out.
Meanwhile the list keeps growing, unsubscribes keep climbing, and the brand keeps sending the same handful of campaigns because no one has time to look deeper. That is not a strategy problem or a tools problem. It is an ownership problem.