There are some pickups here, having said that: more rural utilities people, or landscapers who move lots of dirt, or farmers, might have one. They tend to be smaller than an F-150, but then everything's smaller in Britain including the roads...
For moving yards of mulch, topsoil or concrete blocks, almost anyone in my country, including people in construction would just have that delivered to the site, next day, by the seller.
No clue what van you're imagining, but weather alone makes many things much worse in an open bed. Moving a couch is a very common use of vans, people rent them specifically to move furniture all the time.
minivan != van.
It’s hundreds of dollars to have the same literal dirt, delivered and dumped on my property. So now, instead of driving the truck full of dirt around my property and using it as desired, I now need to do it one wheelbarrow full at a time.
Fuck that.
As for weather, they make removable flat and domed “roofs” for truck beds, the weather argument is a nonstarter.
I can't fit an ATV in a van, and I really don't want to put a dead deer in the back of a van after I hunt one.
I wouldn't trust a van to haul 75 8x8x16 concrete bricks (over 2000 lbs/1100kg) because the suspension wasn't designed to do that, nor was the transmission, and the van will quickly deteriorate.
How about moving a couch? Fits in the truck, not in a van.
I did all of those things in the past 12 months.
All that being said, vans are great, especially with kids. They absolutely do not replace trucks... if you use the truck and don't mind getting it dirty. Shiny trucks with 5.5ft beds are fucking stupid. My kids all laugh at "trucks with a baby bed" these days.
Or, downthread, people just assume everyone with a truck is insecure, projecting wealth, and generally ignorant. Which ironically, is a very ignorant take.