I think that may be right, but if so, that seems pretty unusual to me.
I've gone through a few of these "new kinds of software becoming useful" transition periods - most notably applications moving to the web, and then native smart phone applications - and in none of those transitions was there a dearth of resources on how to spin up on doing useful things due to this "moat" concern.
Nobody was protecting their iphone app dev moat by not publishing books and training courses on Objective-C and XCode...