The question being answered was whether or not Rapid Dragon, if used from a C-130 (or C-17 for that matter) would present the same risk or exposure to GBAD as attempting to fly in and land HIMARS, which could then be used to launch missiles at GBAD or other targets.
From what I have been able to gather about the Rapid Dragon palletized weapon delivery system is that the answer is, "No." Unless of course the users are being stupid. GBAD missile systems, if one is including systems like S-400, have a max range of ~400 km. This means that GBAD units might be within range of airfields or suitable landing strips where C-130 or C-17 airlifters could land to offload M142 HIMARS launchers, before the HIMARS could then be used to launch strikes against the GBAD or other units. Yes, I am aware that if PrSM is loaded, HIMARS might have even longer reach, but it is distinctly possible that suitable landing sites might not be available to get HIMARS onto the ground where that extra range could be used.
Rapid Dragon OTOH has been tested with JASSM and derivatives, as well as JDAM ordnance and is used as an airdrop/air-launch. Using the AGM-158B JASSM-ER, a C-130 or C-17 could release Rapid Dragon pallets up to ~925 km away from the intended target, well beyond the ~400 km range of something like S-400. If the AGM-158B-2 is loaded instead, then the reach jumps up to ~1,900 km.
Basically, using something like Rapid Dragon could enable airlifters to release standoff ordnance at significant ranges from potential GBAD threats, either as strategic strikes or if the ISR resources enable it, to delaminate GBAD itself. That sounds like a better system to use than to try and land land-based missile systems from aircraft, so that the land-based missiles could then be used to try and attack the GBAD systems.
The last bit I posted was in reference to the purchase of 200+ ship-launched RGM-109E Tomahawk missiles to provide the ADF with a long-range LACM capability using VLS cells aboard the Hobart-class DDG's. If the capability deemed important was for the ADF to acquire long-ranged strike capabilities, then Rapid Dragon sounds much more promising to me than fitting and older LACM design in the already too few VLS cells the RAN will have available for air defence aboard the principle air defence vessels for the RAN.