Where "local truck" is "a vehicle that can fit at the location, unlike a semi" and "depot" is "nearby, where their semi is parked", sure. And they do frequently hire local help, rather than cart them across hundreds or thousands of miles.

But it's not like they're going to post office / Amazon / etc "hubs" and changing vehicles along the way - the human labor cost and increased risk would be far too high, though pods might be feasible. The same semi and the same driver does 99% of the distance, and often hires their own helpers. The local shuttling and helpers are entirely reasonable and often unavoidable.

That hasn't been my experience, for a few interstate moves my stuff is on the same trailer at the delivery as it was when it was loaded, although it seemed to be combined with other peoples stuff and made multiple stops for the longer moves. In certain cases when the destination street was narrow it was offloaded onto a smaller truck for the last mile.

Regardless, my experience trying to find movers is that there are a lot of brokers that will arrange either service and don't provide added value.