Qlik Sense KPI object already has action to move to a different sheet in application. Also Qlik Sense has Button object that has the ability to set variables and make selections.
KPI object should have the same capability to trigger actions on click. Users are already familiar that clicking KPI can trigger sheet navigation so it would be beneficial to add the same actions types found in button to KPI object.
It is very common dashboard design technique to trigger actions based on KPI click. For examples changing the measures in chart to use the selected KPI. This would help dashboard design a lot because now we either need to use button for selections or 3rd party extensions for KPIs.