I don’t understand the use of MCP described in the post.

Claude code can access pretty much all those third party services in the shell, using curl or gh and so on. And in at least one case using MCP can cause trouble: the linear MCP server truncates long issues, in my experience, whereas curling the API does not.

What am I missing?

You're exactly right. To be honest, in pretty much every case I've seen, indicating usage of a read-only resource directly in the prompt always outperforms using the MCP for it. Should really only be using MCP if you need MCP-specific functionality imo (elicitation, sampling)