Not that I don’t enjoy a good willy-bashing contest, but could we try to have this remain a discussion?
I don't see there is a way to separate the two. in the case of football / soccer I think money is the dark matter which binds them both.
Premier leagues across Europe : UK, French Spanish, Italian, Portugal etc all generate a serious amount of money
clubs elect presidents, board members all that jazz
during the pandemic some sports were classed elite sports (I think soccer and rugby were 2 of them) and so got more freedom to carry on than others
then of course the anthems. in fairness they create a nice atmosphere at the start of international fixtures
some clubs / fans adopt songs.
you'll always hear Liverpool fans sing you'll never walk alone. and they'll mean it (god bless the scouse) and most probably always hear them sing The fields of Athenroy
Irish rugby team adopted a song Ireland standing tall or some such. had to sit through the national anthem first then the other fkn song before the game got going. I'd be happy if they dropped the national one and went with the song
English rugby fans sing swing low sweet chariot. so mu h better than that national one