Athena is just a front end for the data that a typical user can understand (SQL!). the real value is that the data is: in S3, in a more efficient format (parquet), and available in the Glue catalog.

The other replies got it right w.r.t. other BI tools. If you’re using Tableau I think it integrates with Redshift, right? In that case Redshift Spectrum is an option.

If you don’t have any existing BI tools then Quicksight is an option or alternatively you can spin up an Elastic Map Reduce (EMR) cluster with your fav open source BI tools