The Moon: Creating Capability in Space and Getting Value for our Money, Paul Spudis
"Of all the possible destinations in space, the Moon offers the proximity, accessibility, and materials necessary to learn how to use what we find in space to create new capabilities. Harvesting the resources of the Moon will allow us to make what we need in space, rather than carrying it with us from the Earth's surface. The model currently used to pursue our national interests in space - design-launch-use-discard - restrains opportunity, affordability and capability. We can break the limits imposed on all of these factors by learning how to use the resources of space."


Paul is completely correct in his statement. The one key thing he doesn't refer to in relation to the Moon's significance is...quantity.
The Moon's key advantage over other inner solar system's objects is its size. It's not just a close resource, it's a vast resource - and that is key overall.
I'm looking forward to AA, Masten and XCOR, developing their current units to multi-axis thrust articles to learn the 'knowledge' that will be required for commercial applications.
They certainly don't need to be reminded that if "they" don't, "their" competitors will.