Yes, it makes sense.
However, I used just one example of the grain.
If you have an industry that is going in two directions, Wood or Steel for example that can go to the machine shop to make tools and robotics and also the goods manufacturer to make goods, it also happens. Both lines are treated as seperate items, even in a truck station. An amalgamation would allow a single stack to serve both lines.
Food is the real killer. I have 6 lorries going to various towns, some take longer than others to return, meanwhile their stacks are growing and growing. Personally, I wouldn't want food from the supermarket those lorries supply since it's been sitting in the warehouse for at least a couple of months.
As someone who comes from a logistics background, I find it completely insane that you have a single warehouse that is regularly stocked with a single item and throw an equal amount on two seperate piles despite one vehicle constantly waiting every 24 hours but the other doesn't turn up for several days at a time.