That is a perspective with zero empathy.
These people are amateurs with near-zero resources generously sharing their content with the world. They may have all kinds of reasons for being unable or unwilling to continuously update their site.
The bigger point is that when you create a website according to web standards, it should keep working indefinitely. As for 3rd party integrations, especially when they're enormous (Google, Facebook) they should do the maximum possible to not break anything. The very point of an API is that it's a contract.
Some of my favorite websites about cycling were created by now deceased webmasters. Luckily they are mirrored, but I’m very thankful that they used regular old HTML and images and aren’t rotting after a mere 11 years.
It's a bit like mowing your lawn once and assuming you're entitled to a perfectly manicured lawn forever.