If I am just moving my tractor around short distances, I don't rev it up to 2000 RPM, 1200 is plenty to make it work properly when moving slowly. I could never see the idea of running a motor wide open or nearly so just to creep forward/backward.
I run my backhoe anywhere from idle to 2000 RPM. It works as good as it can at 2000 so no need to go faster and get double the engine noise. When I want to finesse something, I will lower it to idle so the hoe moves really slow, it still has the same power, just really slow so you can get close to fragile things without breaking them.