Next time a transport manager hands me the keys of an artic, along with a pile of delivery notes and tells me to go into several different town centres and deliver pallets of goods to shops where greedy consumers wait to buy said goods as cheaply as possible, I must try that line. "But.... but.... boss; cyclists and car drivers don't like us being in town centres. Can't I drop the stuff off at a motorway services and you can get a fleet of vans to take it the rest of the way?"
"Aye no problem driver, pick up your P45 on the way out!".
Bottom line is, we, the consumers, demand goods in the shops to be available, and to be available cheaper than anywhere else. That means that everything is done as cheaply as possible, from being manufactured in sweat-shops in the far east, to being delivered by an artic rather than several vans. Reason being is quite simple; cost.