Frustrating in what sense? If you shoot 100% JPG or 100% RAW the issue never arises, and if you shoot some of each, I'd have thought that a relatively consistent workflow would ease frustration.
Well, yes and no. I mainly (like 99%) shoot raw, but sometimes I might have to import RGB files to LR which have been converted by an external RAW converter.
To put it simply, I would like to know which buttons work on RAW and which on RGB data (implying an internal conversion from RAW to RGB when the input is in RAW) in order to use the best tool for the job.
On another level, I recently saw a question in another forum by a somewhat novice user, asking whether we need RAW now that we have LR and we can change things like WB and exposure on jpeg files... See the confusion?