Once the clutch is engaged, your flywheel might as well be bolted to the transmission. The clutch only matters when it is slipping.
FYI, BDAB, there is a risk to your approach. The engine won't lubricate properly at idle speed at full throttle. I'd say there is a happy medium somewhere. You have to balance engine risk against clutch risk. I agree that you should get off the clutch as fast as possible, but I think that's a bit too fast. Note that you have the same issue with an automatic transmission -- the fluid will burn up if you "slip" the torque converter excessively under heavy load.