The old joke back at school was that your Da had to sell the TV to be able to afford a video recorder. You wouldn’t dream of buying a car but not being able to fuel it, or run a business but not be able to service your customers. We understand that buying the car or starting the business is just the start, and they will run into terminal disrepair after a while if they aren’t maintained and reviewed.
In the same way, we need to see content published on the web as a process which needs servicing once it is live. That servicing involves reviewing it on a periodic basis to ensure that it is up to date, still accurate and still relevant.