Your arguement doesn't make any sense. If we follow your rationale, nobody would ever use small local airports
Now if you read what I said, in response to the suggestion of EI starting a once daily flight LDY/LGW, would it be successful?. Well if I lived in Londonderry and I wanted to go out for a day trip to London, or a specific time during the day, and the EI flight is not that time-I will drive for an hour to BFS and fly from there. So this multiplied up causes alot of loss in passengers. So then you are talking about EI starting a 2 daily to gather up maximum market share. So then is LDY an area capable of 2 EI and up to 2 FR flights a day to London. I don't think so.
Or are you suggesting the likes CO are going into Carisle, simply because its a small regional airport, with 3 daily returns to Newark.