I'm not totally clear if we're all on the same topic. I thought the issue was simply that some saw potential for DUB-ORK flight for people who wanted to transit through DUB, perhaps as an alternative to using LHR etc. For my part, I'd assume that anyone going between Cork and Dublin (i.e. if Cork or Dublin was the final destination), they'd use either car, coach or train. I can't see how air could compete with land over those more convenient and frequent alternatives.
Best thing Cork Business people can do is to make a concious effort to fly from Cork via LHR, CDG AMS.
Presumably Cork business people will do whatever makes sense on time and cost grounds. If using LHR, CDG or AMS is the most efficient method for particular journeys, beating the costs of an initial land journey to DUB, then that certainly is what they should do.