Surely you jest. Soccer is played on many days, besides Sundays.
And yes, adults play it.
And some adults watch other adults play it, and bring their kids to watch adults play. Not usually on Sundays, but sometimes.
I don’t jest.
IMO, Sunday sports, in person or on TV, is a big reason for the decline in church attendance. And when church attendance declines the result is what we have in America today.
I shopped after church today, and there were far more people wearing team athletic clothes than Sunday go to meeting clothes. And that’s in TN Bible belt. It must be more prevalent in more liberal areas.