Pete, the examples of groundsharing you gave are miles away from what was being proposed for / foisted on (delete according to your point of view) the Dublin clubs. You're not even comparing apples and oranges, but more so apples and yoghurt or something.
Cork aren't competing with the MFA, nor are Galway competing with the schoolboy league. Us and Rovers would be in direct competition if we were to be shunted to Tallaght and up until Shels' financial implosion, so would they and Bohs have been on the northside.