To haul dirt. To haul junk out to the dump. Etc.
Do people load their Transits with piles of dirt and mulch? I doubt it.
I live in the US and have a small house in the city, and I haul stuff like this all the time.
Yes, you can rent a pickup truck as needed from U-Haul, but that gets old real quick.
Yes, I would love it if there was a nice small or mid-sized truck with an extended bed available, because most trucks are overkill for my use case.
But this idea that no normal person needs a pickup truck a dozen times a year is just weird.