Have you ever loaded a truck?
Picking up and pulling towards you is much safer than pushing/jamming things in.
Ahhhhh yeah, for like 45 years now, between farming/construction/landscaping/dirt bikes/ATVs.
The OP is trying to say that the only way to load plywood/drywall into a pickup is OVER the sidewall of the box/vault.
I've loaded/unloaded hundreds of drywall and plywood sheets, on my own, w/o injury or incident. As a matter of fact, unless you are taking more than 3-4 sheets per trip, it is easier and safer to do solo.
Is this some sort of millennial forum/thing, trying to dissuade purchase of the CT?