American companies love doing this, for the data mining to the sell.

Those hackers probably aren't teenagers having fun. This is more likely part of a moronic Russian cyber attack against Europe.
They are doing their job, and waging cyber warfare. Why we (Europe, NATO, USA) keep just taking it without retaliation IDK?
It is also moronic how these system are allowed to be remote controlled, the risk of mistakes seems way greater than the cost of having a manager perform the control locally based on local observations.
Even if the routine could be fully automated with an algorithm, there is no reason why that couldn't be local.
But it will always require human interaction to handle the content, so I simply don't see any purpose of having these coolers connected to the Internet?

Yes but also it seems kinda foolish to have something like that connected to the internet at all. I can see some use cases for wanting centralized visibility on infrastructure like freezers but what is the situation they would need to be shut off remotely?

Eh, hopefully a wakeup-call to what we have warned our bosses for the last 30 years.

Russian hybrid war in effect