I would agree that they often expect way too much. I have been a staunch advocate for scanners on the back of cars to give loaders the technology backup UPS gives drivers through diad.
Still, the op's point is what a bad load does to drivers.
I know what the load does to the drivers, it's out of the preloaders control is what I'm trying to get across.
When I go into work, there is a load diagram for the number of pieces per shelf taped to back of the PC... there's been a few times where section 7 or 8 will have 90+ pieces while the rest will have 25-40, it's not a preloader problem but a dispatch problem