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 C

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.