I just thought of this, and I want you to view it from your own perspective. As everyone hopes that more people get to believe and use bitcoins, I think bitcoins can gain more new users on a large scale if anyone (whales ) can place their advert through a popular football club just as some companies do sponsor football league. I think this will send a strong message to billions of people across the world who do know but does not embrace Bitcoin usage.
Let me site another example, let's take for instance, a club announces that they will pay their players in BTC. This news can also help people adopt BTC.
But Bitcoin is not a company to promote itself through advertising organizations in sporting events, and I do not think that any advertising company will be interested in promoting Bitcoin without direct returns. Your idea was implemented a little differently after some platforms started advertising campaigns in the stadiums, such as the Binance platform, whose logo appeared in all matches of the last World Cup in Qatar. This is in addition to some casinos in other sports tournaments.
I think this helped raise awareness of crypto in general and the benefit of its uses to a large group of people.