So your argument is that because the things to copy are few, this feature doesn't matter? Or what? I fail to see how what you say contributes to the discussion of vertical integration in any way.
Not few none. People need to share files, tabs, messages, mails. If you can share the things people actually want shared then sharing the clipboard itself has zero value.
Your response is completely irrelevant to the discussion of vertical integration. Whether or not you find use in it is up to you, and I don't really care.