I mean the whole rest of the world seems to manage just fine without these, and we have tradesmen as well? The cabins can be as clean or dirty as you need, I’ve seen everything, loading trash or debris is also fine. If you’re really carrying mostly gravel or other type of stuff like that then you’d have something specialized for that with a much bigger box than on your pickups, or rent it for the job.
But looking at your other comments in the thread I see that you’re just set in your ideas and just looking at finding justifications for niche cases where it might be a superior vehicle, which I don’t deny certainly exist, but that’s not the problem, the problem is these are a dime a dozen if not the majority on your roads, and they’re not at all good as normal vehicles whereas the vans are. Also they’re honestly just superior in pretty much every way, flat bottom, low load-in height, can accept pallets, stuff stays dry, locked, engines are efficient and not crazy oversize and gaz-guzzling, they have good viewing angles at the front (e.g. you would see a child in front of the vehicle), etc etc etc.