I became an SME at troubleshooting certain medical software, as well as setting some of it up in a VM (don't want to get rid of a $30,000 machine because the software only runs in Windows XP). I once had a specialist get mad that I wasn't able to interpret the graphs of perfectly working equipment. Apparently just because I knew how to determine the steps to take because of an error code, that meant I should also be able to understand what certain musculature stimulation graphs meant for a patient's chances of recovery.

The knowledge to interpret and act upon that, for those wondering requires medical school and residency. The people who can do that often earn, in the US at least, more than $300,000/ year.