Why are the associated measures not accompanied when Expression measures are dragged to publish a KPI?

Why are the associated measures not accompanied when Expression measures are dragged to publish a KPI?

In most of the cases, base measures are not required to be displayed in the KPI. So when a measure is not required, it has to be hidden using the Show/Hide feature. To prevent the step of using Show/Hide feature, the associated base measures do not accompany when Expression measures are dragged to publish a KPI.