>That is, for Marx only primary production creates value, all other economic or human activity destroys value. So for example in Marxism making a clock creates value, but transporting that clock from the factory to a shop, giving it shelf space, advertising it and selling it to a customer all destroy value.

This is the most bizarre take on the Marxist labor theory of value I've ever seen.

Do you have a source for this idea that transporting a clock destroys value?