the question has been answered that your DBA can work without RDP.

What's been addressed is that you now have twice as much work to do since they cannot.

Do you have your own projects? How do you prioritize your time vs the DBAs?

If he needs:

A folder created for a new database.

Drive space checked.

Their SQL Server service restarted.

A registry key changed to add it to the MSX node.

Move a backup and the transaction logs to the mirrored site.

Verify backups are getting to your DR site.

3 AM move the log files.

Look at the system log files to see why SQL failed.

Troubleshoot quicker why that mission critical database that your company lives off of is down.

Do you drop everything to support them in a major outage? San crashing, network being affected by the gods of Asgard, servers coming up without the san and needing to be hand held back into production... You're now doing all that on your own while your DBA is asking for you to move the backup he has from one server to another to get your DR site up. He can have it back up while you keep fighting the fires else where. There's countless reasons it would make your life and your DBA's life better. They don't even need SA... Give them view of the OS drives and full control of the database drives. There is a middle ground. ^.^'