I guess what I'm trying to say is that, shooting JPEG for the reasons stated by pgtips seems a bit more like "Fixing it right in camera" than "getting it right in camera", you might be shooting it wrong, but the in camera processing will never let you know it.
JPEG has a lot less processing latitude than RAW files, so I have no idea what you mean by in-camera processing never letting you know that you're shooting wrong. If anything, the opposite is more accurate. Shooting in RAW and then running it through a RAW converter and enabling automatic exposure correction will tend to hide most metering flaws.
The issue I'm having is one that's more mental than anything real. I've stated this before elsewhere, but I'll reiterate it here. I find that when I'm shooting in JPEG, I approach photography slightly differently. I end up taking more time per shot, this not only allows me to carefully consider what white balance to use, this slowing down also allows me to focus more on composition.
At the end of the day, this is what works for me and it's the most efficient workflow that I've discovered. YMMV (your mileage might vary) of course.