Well that was the theory but it's never really worked out in practice due to security, maintenance, and logistics obstacles. Aircraft in forward bases are too vulnerable to mortar attacks. And all the fuel, parts, and ordnance has to be brought in by truck convoys or helicopter. It's just totally impractical.
It’s impractical in a setting like Iraq or Afghanistan, sure. On the other hand, if the Marines were to land on one of the Spratly Islands or on the coast of Norway, they could construct an airfield and have the Navy supply it from the sea, freeing one of the carriers or amphibious carriers to be redeployed elsewhere (or perhaps just adding to the local airfield capacity). Being able to base and operate STOVL aircraft days or weeks before heavier aircraft can be deployed there provides a significant advantage.
