I reckon of the 90% that don't make any data driven decisions with the dashboards they're provided, there are three causes I run into frequently.
1. They can't describe what info they need
2. That info isn't available.
3. They don't make decisions based on data at all.
I feel I'm getting better at addressing 1 and 2 the more I do it, but I figure there's a fair amount from group 3 who demand the reports nonetheless...
As an aside, you mention Tableau, QlikView or PowerBI, have you tried Apache Superset at all?