Distribution

I understand the pros and cons of both lines, and distribution offices, but I’m confused as to the amount of posts saying lines are more efficient than distribution offices. I get not wanting to use trucks with partial loads, but if you have an open storage or warehouse feeding your buildings doesn’t it make more sense to have a distribution offices deliver the materials?And set them set to a percentage that wouldn’t allow them to deliver goods unless they could drop off a full load?

I find myself using distribution offices 80% of the time for moving materials around. I really only use lines moving workers, waste trucks, and delivering critical things like coal and chemicals.