If a txt2vid model could generate a 100% perfect video of a soccer match, perfectly rendering each blade of grass, would anyone watch it? No, because we care about the team and the stories of the players. Not just the spectacle being shown.
But AI would produce hilarious and memeable soccer matches. Those are enough to reserve your attention and waste your time.
Well actually hockey in particular could be entertaining, depending on how they play.
Are you seriously telling me you wouldn't enjoy watching mechas going at it with greatswords? As a bonus (as suggested regarding cars by another commenter) mount explosive charges to weak points that must be defended.
So maybe if people were actually piloting or tele-operating the mecha, but just watching semi-autonomous war machines destroy eachother? Meh