Ok sure, the "never" was a bit strong here. Running CLIs on phones is not a normal thing and not as simple as it is on desktop. Apple prohibits apps from downloading and executing code, so some sort of new Apple-approved thing would be required here. That's a very heavy lift.
Of course anything is possible, I just don't think that people advocating for MCP's death have really thought through these problems, and are mostly focused on the desktop productivity use-cases.