Being wrong is part of this job, and some people just have a flair for it. One of my most egregious recent examples was a concern that Katie Taylor might not be able to sell out Croke Park for her farewell fight next month.In the run-up to the fight announcement, I was worried that (for example) a 55,000 strong crowd would be an incredible turnout for our most beloved boxer, but it would feel like an anticlimax in Croke Park. I just didn’t really see the difference from Katie’s point of view between fighting in the Aviva, where 55,000 people would constitute a sell-out, and fighting in Croker, where getting a full house was going to be a far tougher proposition.She was adamant that it would be Croke Park, given its unique status in Irish sport, or nowhere. Within 30 minutes of the tickets going on sale in June I had my answer, and so did Katie. I had underestimated both the significance of the venue to her and the level of her popularity. And so Katie’s sold-out final fight will bring down the curtain on another summer in Dublin 3, after The Weeknd and Bon Jovi have had their say this month.I found myself questioning my judgment on Croker again over the last week, as the GAA experienced some blowback for the decision to host Manchester United and Leeds United in a preseason friendly game. It was another sell-out, for a parody of what competitive sport is supposed to be. But everyone seemed to have a fine time.I was in the War Memorial Gardens on important journalistic business (trying to watch a solar eclipse through a cereal box), so unfortunately I was unable to watch, but the whole evening seemed to pass off without a hitch.The following morning I went to work and had a couple of emails waiting for me, asking for an urgent debate on this issue. The basic upshot was that the GAA had to have a discussion about the future of these events in Croke Park. Who are they for? Who is deciding what happens? Where does the money go?I was rather taken aback. Saying that the GAA reinvests 83 cent of every euro it takes in is so well-established a fact that it almost feels pointless referencing it ... but it’s true. Croke Park’s doors close to GAA activity at the end of July, and locking it up until a couple of club games a week or two before Christmas makes no business sense.Jon Bon Jovi announcing details of concert in Croke Park on August 30th. Photograph: Dara Mac Dónaill/The Irish Times