Because genuinely only about 20/30% of the crowd know the words to the songs.Maybe a daft question but..how come the whole ground can seemingly stand up to do the Poznan in unison quickly by sight yet songs don’t spread at all well around the same areas of the ground ?
You’ve got so many first timers, dads who are Liverpool/arsenal etc fans who are taking their little one because they want to support city (honestly met quite a few of these, 4 dads of 4 different kids when my son was a mascot supported different teams)
Then there are people who just go to the game and watch and don’t want to sing.
Maybe we should organise a song sheet to be put on each seat before the game!