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