Yep total agree, handbrake is for doing just that !!
Strangley whilst out in a car (NOT my Disco) my eldest daughter will sit at junctions and traffic lights with her foot on the clutch, and the car in 1st gear !!! - when I 'dared' to ask why, and suggested that it was bad practice, she retorted that she had been taught that method by her instructor (what did I know, just being a advanced driver with over 30 years and approx 800,000 miles under my belt) with only 5 years not in a Landrover (I realised the error of my ways)
I explained that it wears out the clutch thrust bearing, and is not got because if her foot slipped off the pedal the car would lurch forward, possible into the back of the one in front !!
I may as well have been trying to explain how to split the atom - and I won't repeat the reply !!!!!
I think it should be part of the driving training etc to teach a basic understanding of how a car works, and to have some sympathy for the components - I guess that is a whole different debate !!
I guess I'll never change now, and will continue to drive with consideration for my LR, with an ear to the engine and all the other parts that allow it to be almost 'alive' still be plodding along into it's 2nd 100k mileage only having replaced 1 set of tyres and 1 set of brake pads so far !!
Steve