Who said auto metering? You still have full control of the meter in priority modes.
If were not talking about manual, than we must be talking about auto am I right? And I never said you wouldn't have full control, I was simply saying its easier in manual because nothing changes no matter what you are pointing the camera at.
That's a good point. If the camera moves, or anything in the frame moves that shifts the metering, the "auto" part will automatically shift to compensate, whereas in manual, you're locked in and it will ignore that change to give a consistent exposure value.
Think about doing panoramas. That would be a terrible time to try this out of manual, even though we, technically, do have the ability to dial in anything we want, we'd have to re-dial it in every time we shift to the next overlapping shot of the intended full scene.