Several points -

First, mcp, like cli, like api, is a kind of (user facing) interface, just not graphical. It still needs to be designed, just by different people with differing skills.

Second, textual interface can only go so far in terms of information ingestion. Trying to describe a complex relationship between entities can be extremely difficult with text. However, a good graphical interface will make complex information easier to digest.

So in my opinion, the moat will emphasize organization which knows how to plan good a custom experience, whether graphical or textual, and less where tables and forms are the main business