The automatic download isn't possible however the navigating of the server could be reduced by either:
- Setting up a subscription to email the report (with a link to access on the server automatically included) to the user
- Set the view as a favourite in the server or in the browser to reduce the clicks to get to it
I'd suggest looking into tabcmd export for this. tabcmd Commands
It allows exporting dashboards to csv from Tableau Server. It can be scheduled with Windows Task Scheduler to run at any specific timeframe you need.
Hope this helps!