A machine that cannot be abused is unlikely to be useful for anything else. In this case, almost every time I work with LLMs I need to use the clipboard to transfer data.
That involves at least three steps - select the element in question, highlight all the text (which may not always be as simple as pressing Ctrl-A), then press Ctrl-V.
A click to copy button is one convenient step.
LLMs are no more special than sites like GitHub and many others, which all provide this feature.