Analytical tools and visualizations: Analytical tools and visualizations are user-created and allow quick exploration of data.
All the above: Role-based security, extensible data security framework, and table permissions framework are tools that allow you to grant and deny user access to certain data.
You can deploy all the reports at once, and you can deploy reports in environments that are not Production and do not have Visual Studio: These are reasons you might need to use the PowerShell command to deploy a report.