Because it makes the players seem bigger to their opponents, the main wearers of a V stripe being St Helens identifies bigger cheats/dirty players
I did wonder if it was something like that. I don't know much about rugby league but I've been watching a bit of the current World Cup with my dad and noticed that lots of teams seem to have a V design on the jerseys, and I did know St Helens did too. Are St Helens dirty cheats?
I do remember getting talking to a bloke from up north who was down this way with work and was staying in a local pub, I remember asking him about a thing that had puzzled me for ages, which was does a team ever push in the scrum rather than the non-contested affair that usually happens? He told me that it does occasionally happen. I've never seen it though.
Anyway, the best, most iconic rugby jersey is cherry and white hoops, like the mighty Gloucester used to wear, and I believe Wigan did too.