It’s respect to the audience, a lot in the US don’t watch till the evening. Every other piece of content has put up a spoiler warning too before talking about the finale.
But to your defence, if people don’t want to be spoiled I’d tell them to stay off social media till they’ve seen it, as it’s very likely to catch the result
@madjackgolf Likely would have been Brad’s first pick, they could have been the team to beat and make it all the way to the finals! Hope you’re both there next year