I'm not here to defend brodozers, but you cannot possibly prove this statement. That a _pickup truck_ isn't hauling the majority of the time it is on the road is not some new thing. But of course there are more pickup trucks on the road than ever, so if you argument is aggregate time of all pickup trucks not doing truck things is the highest its ever been is certainly true, but you'd probably have to go back to before the 80s for that number to actually be meaningfully different per truck.