I prefer TUIs over GUIs primarily because TUIs are often tailored for advanced users — essentially, for professionals. In contrast, the majority of GUIs prioritize user-friendly experiences for the general consumer. When a 'TUI' begins to incorporate features like mouse-clickable buttons, drop-down menus, scrollbars, windowed interfaces (as opposed to panes & separate screens), it gradually shifts away from its core…
I don't think the two use cases are mutually exclusive. You can have that keyboard driven muscle-memory workflow, while keeping things discoverable for users who haven't committed everything to memory.
New users tend to get really involved with the buttons, but gradually shift to full text control over years.
Obviously in CAD sometimes you cannot enter coordinates and must grab the mouse... but it's still faster if you minimize use of the mouse.