In your original post you say "But stuff like tab headers, buttons, or even text-sparse tiles - things meant for the user to click on - can, and usually should, prevent text selection" and you explicitly mention that you leave out anchors.
So far no reply to me has talked about problems causing by having selectable "tab headers, buttons, or even text-sparse tiles".
I am still 100% open to hearing about it. But I can do away with the personal attacks and sarcasm.
The article is not advocating for breaking anything.
And unlike me you haven't provided a single example so far, only workarounds for people who don't like your suggestions.