Over the past few months, I've been prepping for SQL Server 2012 Administration exam 70-462. I have experience performing admin tasks in the development and QA environment, and even a short stint as a production DBA many years back. Indexing, performance optimization, and role based security are just as much a part of what I do as a database developer as writing T-SQL. However, there was a lot of new material, things like installation options, change data capture and various disaster recovery features, that was new to me. It really helps to have something like a certification to use as a target for study and a good study guide that lays out the material in a comprehensive and structured way.
As a side, I was reading an article once that most medical operations (not brain or heart surgery but more routine out-patient procedures) could actually be performed by someone wihout only a few hundred hours training. Understand that they would only know the step-by-step technicals of performing that *one* specific procedure, and they would need a real medical doctor, anesthesiologist, and fully equipped facility on hand to back them up. This would basically be Henry Ford meets healthcare.
"The universe is complicated and for the most part beyond your control, but your life is only as complicated as you choose it to be."