Nobody is going to drink less Coca-Cola because Cristiano Ronaldo doesn't drink it. So how can something like this move the stock price? Do stockholders watch T

Nobody is going to drink less Coca-Cola because Cristiano Ronaldo doesn't drink it. So how can something like this move the stock price? Do stockholders watch TV and then run to their brokers shouting "sell sell sell"? I don't understand this, it seems completely meaningless. I can see the stock drop should Coca-Cola publish a document "how to be less white in workplace" for example, but someone moving a bottle away from cameras... I don't get it. Can someone who works in the financial industry explain this?