Yes but in what major engagement that we could reasonably expect to face in the next several decades would a USMC task force be sent without a carrier group. If there is a serious need for airpower in a region there's no way we're not going to send in a supercarrier.
It is highly unlikely that a MAGTF would be in-theater without a CVBG in the area. However, the CVBG may not be tasked with supporting the MAGTF, or other tasking may take priority. The MAGTF's squadrons are tasked with direct support of the TF's ground forces before, during, and after the landing. Relying on the CVBG for this either forces the CAG to split its resources and attention (reducing is efficiency) or leaves the Marines with no air cover.
I know that is the rationale for USMC CAS but I just wonder if the cost of acquiring and flying a STOVL aircraft just for that very specific requirement is justified.
In the case of the JSF program, maybe if that requirement had gotten split off from the rest of the program it could've been done for a cheaper price that would make it worthwhile. But the costs of the F-35 are still not done soaring out of control and at the end of it all I can't imagine that it will be worth the cost for the Marine Corps to have air cover during amphibious landings.
MEUs never have a carrier attached, as carriers only sail in CVBGs. However, there has been at least one CVBG in-theater constantly since OIF began, and I doubt the Navy would ever send an MEU into a theater that did not have a CVBG present.
