The lower the revs you inch at, the less wear on the clutch. I've had my own cars for 35 years, all have been manual, all have a dry clutch. The traffic around here is horrific. I've never warn a clutch out. You have way more control with a foot throttle. Never mind the noise and fuel use. I cannot see a single reason not have one, and using the hand throttle on a loader tractor sounds crazy. In my youth the farmer didn't like repairing machines, when the foot throttle cables broke, he never repaired them. Driving the tractors was a ball ache. The tractors I used when I was in the USA had no foot throttle, utterly pain full