No, absolutely not, this is not about exposure. It might, depending on the scene you shoot but mostly, no, the RAW will more often than not contain a far closer representation of the scene you shot than the jpeg can. Shooting in 8 bits will, mostly, clip highlights or shadows, you're chucking away useful information.
I've never understood this idea that it's somehow wrong to post process the images you shoot. It's a huge step backwards in photography, post manipulation was, and still is common when using film for almost identical reasons that you post digital. Film is capable of resolving somewhere around 15,16 EVs of luminance. A modern, high end DSLR will resolve 12, maybe 13 at a pinch but in both cases often less than the luminance range of the scene shot and somehow you have to deal with that. The challenges when printing analog neg always were about remapping the scene you shot into your display space (7 EVs or thereabouts print ), pulling the shadows up and the highlights down; these issues are the same in digital, arguably more so. No self respecting photographer wouldn't burn or dodge his print in a darkroom, you simply always did.
So if it's acceptable for film, why take the step backward when using digital? Why would you do that?
Someone mentioned earlier in this thread that you shouldn't post process a photograph. Leaving aside the judgemental tone of that statement for a moment ... why wouldn't you, what difference does it make to your picture whether you expose it an extra stop or two in camera or whether you push the RAW or the film a bit afterwards; absolutely nothing. In the final analysis the only thing that matters is the picture on the wall. How you got there is completely irrelevant.