It’s not about 'Genealogy' or for genealogists, it’s about entertainment for the masses, a voyeuristic gawk into a subject’s ancestry. As the series grow in number, the guests are decreasingly ‘famous’ and the producers are driven to hone in on one of 64 gggggparents which is rather meaningless in an overall picture of a family. The more salacious the tale the better, but it has to be politically correct. The producers miss (ignore?) many opportunities to comment on social history. I have no doubt that the Canadian element was known by the guest & producers, a decision was taken not to include it.
I found it odd that they brought Diarmuid Ferriter to Ballina just for a couple of sentences on the Civil War. Has he appeared before?