I have been thinking about all the times I have been to the range. I have only seen a few people that didn't use the bench and usually bags or a gun rest to shoot from. I think a lot of people would be very disapointed on how much their groups will open if they didn't have a bench to steady their rifles.
Probably what would be much more important than seeing how tight you can group your shots is to see how fast from a standing position you can place 5 to 10 rounds in a 10" circle at 100 yards.
I will have to admit that I am as guilty as anybody about spending the day at the range and using the bench instead of free style shooting.