thats the idea. Once realize the shot is screwed can immediately make changes to the camera settings for the upcoming moments.
Its insurance compared to blindly just shoot and shoot with the belief that since metered using camera sensor, nothing will go wrong.
I still have yet to see a photographer using incident metering during events such as performances though.
Would be very interesting.
So you doubt the camera meter? I say maybe you need to learn how to use the camera meter.
In events when something on stage happens, and your subject is in very much stronger light than the surroundings, you have a choice between spot metering the subject, or using matrix, shoot with an exposure bias, and hope that it will be okay, relying on your histogram for fallback, which do you think is safer?
If you can honestly tell me you can rewind time after checking your histogram, then I put all my trust in the histogram and will not ever learn how to meter. I grew up on film, so I had no histograms; proper metering takes precedence over histogram checking. Shooting digital gives you the histogram, yes, but it does not allow you to rewind time.