I disagree so much.
Cork has proven it has the market for other airlines, it has proved this ~2007. The loss of these routes would be completely down to a lack of advertising. Nobody knew about them! After the cancellation of the first few flights, CSA Czech airlines and Prague airport put together a small marketing fund (Cork was not involved at all), but was only aimed at the Internet.
The refusal of Cork to advertise the routes have lead to their loss, nothing more. Not much has changed since 2004/5/6/7. Ryanair have gotten less aggressive if anything IMO. Its likely that they wouldn't have touched the Prague route. Flag airlines can go to Cork, but they made a balls of this right from the start.