Data-based architecture means that you have all data about an entity in a single place. Even though if you analyze the domain and all use cases you find that there are slices of that data that never interact together.

Example is storing customers address and purchase history in same place, only because they "belong to customer" in a data sense. This is very bad because it leads to entangled architecture where everything depends on everything and you cannot extract truly independent modules. The project implemented like this simply cannot scale beyond a certain size.

So no, data is not important but how it is used.