Heck, oil is probably the "default" example of what a commodity is, but we're now all acutely aware of what happens when moving that oil from one place to another becomes exceedingly difficult.
It is not. As a case in my point, Spain had a blackout last year (and I completely believe they are competent professionals - the task is just hard).
> It's just that those interconnections haven't been built yet.
They haven't been built because the grid isn't just a technical problem. It's also a socioeconomic problem, and adding new interconnections would require finding who needs to pay for it ; and currently, that question has no answer.
The difference of course is that the invisible hand of the market gets that fruit into grocery stores. For various relatively good reasons, power is driven by very visible hands.
"Brain surgery? Well, that's not exactly rocket science..."
Off the top of my head, we've recently had shortages of fresh strawberries because of weather in California, a shortage of peas because of weather too, and various changes in Trump's tariffs were done to try and alleviate the rising cost of certain fruit and veg.