3 hours ago, Gadgetron said:But this doesn't explain why they bring their capital ships into combat, why present your wingless liberties to the death star when a fighter's too small to target. I understand the plan was an ambush (and it wasn't supposed to be operational), but why bring the whole fleet when they could sit safely in reserve while the squadrons engaged?
The answer to your question varies depending on how and how much realism you want to apply to Star Wars space combat. In most cases, the reasons are fairly straightforward, and also answer the question, "Why does the US Navy use supercarriers and their attendant escorts as frontline combatants instead of summoning the Air Force with intercontinental bombers and escorts?" Fundamentally, the larger ships offer superior coordination capabilities, the ability to rearm and refuel, and can add the weight of their own weapons on the target. Logically, the proton torpedo carried by an X-wing has an effectiveness ceiling lower than a proton torpedo fired by the Profundity, and has a smaller magazine to boot. The same applies writ large, and goes double for energy batteries. Executor was crippled by the A-wing strike, but its bridge deflector shields had failed under the combined bombardment of the Rebel capital ships. Whether or not Armada fully represents this combined arms effort (ship fire plus precision bomber strikes) is obviously a matter of contention, but that is as reasonable a conclusion as can be drawn.
As to the combat effectiveness of the Rebel fleet itself, the presence of a fleet in being is a powerful strategic tool to wield, one wielded with skill in the fomer Legends canon. (I have no idea what the current canon says on the subject, and only barely care to find out.) Whether or not capital ships provide more efficient threat does not impinge their ability to apply concentrated threat and concentrated destructive capability. I also point out that in the briefed plan for the attack at Endor, the Rebel commanders believed their cruisers to have sufficient firepower and durability to screen the strike wings against Star Destroyers and swarms of TIE fighters while holding station above the Death Star. Obviously they did not expect either the size of the present Imperial fleet, or an operational superlaser, but they had to know there would be a significant presence guarding such a massive investment of military resources, plus old hag-face himself.

