Yup, spot on. Scotland developing talent is a work in progress (with positive signs in my opinion). The depth is reinforced by "qualified" players. The point with that though is that a player who isnt good enough to be selected for their country of birth (or their parents birth) is unlikely to ever be good enough to truly perform at the highest level for a Tier1 nation, or even possibly a club side.
I do think Scotland will continue to improve its native depth though. Darcy Graham looked great on the wing and Edinburgh have a couple outstanding young looseforwards in Ritchie and Bradbury. Kinghorn is now a confirmed world class player in my opinion and all these guys are young, barely fringe players for the national team - the depth might be there come RWC 2023.
Edinburgh seemed to just think the game was won at halftime and left their brains in the changing room in the second half. Can you imagine being on the flight back home with Cockerill?