Well are all these people you talk of going to the showgrounds, No there not! On average there's under 2,000 people in the showgrounds for a Rovers game.
The Champions coverage of GAA covers many clubs and the county, teams senior and underage. Half those who play junior/underage soccer in sligo don't give a flying sh1t about Sligo Rovers, therefor the they care not about the column inches dedicated to Rovers in the champion and may even dare i say, take more interest in the GAA reports. I'm typing up a questionnaire to justify last sentence and provide fact for you.
So your argument doesn't really stand up. Just becasue you play soccer doesn't mean you want to read about Sligo Rovers.