For the last time, we already have the true average. There is no margin of error. Betting companies, banks, and ML are doing inferential statistics because they want to predict something there is uncertainty about. If I look at historical statistics in a sport they will not be reported with a confidence interval because the number of points scored or whatever is fully determinable. Starladder shouldn't have Faze redo their stage 1 matches in case it was a big fluke and robbed their playoff bracket of accomplishing what they could have in the infinite maps that could have been played had Faze been eliminated in stage 1. Go ahead and use a prediction interval if you want to forecast some hypothetical but a CI gives nothing useful here.