I agree, the article does explicitly say that; the thesis of the article and the information it presents to support that thesis are entirely at odds. That's what I'd argue this is a poor article, just an advertisement for the world's eighty-sixth todo app; yet it keeps getting re-posted here.
I honestly feel like we're not even reading the same article. His contention is that MCP, while created for AI, can serve as a universal plugin system. He's writing software that... does that. Not seeing the contradiction.