As a DBA, the #1 reason (for me) I seem to need access to the server itself are for diagnosing ETL issues and managing of SSIS packages;
we have a lot of SSIS packages, adn they exist and are executed on the server.
We have a large number of scheduled jobs migrate data from various flat file resources to staging folders for further processing; think of the classic migrating of SFTP files from one source to the server, so they can be bulk inserted, bcp, or have an SSIS package fiddle with them.
I very often need to open those files directly, and for that
access to the proper folders or shares.
Lowell