I don’t know about you, but there’s something about a whole stadium of people singing a hymn that never fails to stir my soul.
So, no, it doesn’t matter that it’s only a sporting event, the hymn is traditionally associated with Wales and the Welsh team’s playing, and people have, perhaps, a lot of different motives for singing it. What matters is that God is praised, Christ is exalted, and the seed as sown: Who hath ears to hear, let him hear (Matthew 13:9)).
It is one of the good, great things we still have to enjoy. Thank you.