Give me an example of a real-world use case where this caused you an issue, and I'll show you where their UX design is poorly made, rather than a need for selectable text in a clickable element.
There is a certain page of one of the Bundesagentur für Arbeit websites that doesn't play well with automatic translation.
I speak B2 level German, but even then some of the technical terms are still complicated or unknown for me. This included one very long German word that was in a BIG RED button and the text in the big red button was not selectable, in the manner described in the article.
That's cheating. Terminal is in a sense the ultimate accessibility viewer, but few things work with existing terminal browsers I know of.
Makes me wonder though, if anyone tried to take a SOTA screen reader/accessibility software, and use it to re-render the page purely from the "how the screen reader sees it" perspective (obviously with selectable text)?