To me, here are the pertinent rules that apply to an EC-12 where the skipper can/should be given redress.
62 REDRESS
62.1 A request for redress or a protest committee’s decision to consider redress shall be based on a claim or possibility that a boat’s score in a race or series has been or may be, through no fault of her own, made significantly worse by
(b) injury or physical damage because of the action of a boat that was breaking a rule of Part 2 or of a vessel not racing that was required to keep clear;
E6.6 Redress
Add to rule 62.1:
(f) becoming disabled and as a result retiring because of the action of a boat that was breaking a rule of Part 2 or of a vessel not racing that was required to keep clear.
My point is that it sounds like you do not need to retire in order to be granted redress.