because it's performed in sets of tunes, if you like a particular tune you might go looking for recordings of it, and its usually mashed up with OTHER TUNES, including some you might not know, so its VERY easy to just rabbithole w/ irish trad ESPECIALLY if you're using irishtunes.info (thank you alan ng you are a hero)
its like a musical tradition based heavily on "covers", homage, and mashup, and that RULES
the tunes are frembs with each other