Yeah, it’s a bit ragebaity. Afaik the solar panels can be “turned off” (disconnected from the grid/open load) just fine, and there absolutely needs to be a way for this to happen automatically (a proper smart grid).

The big power plants are another story.

The first reauui found is kinda interesting — even conventional diesel generators have this issue https://www.cat.com/en_US/by-industry/electric-power/Articles/White-papers/the-impact-of-generator-set-underloading.html