Do more TUIs.

People are unable to do good GUIs. The web shows this; completely disregarding any UI guidelines by web people established since 80s is a proof that most people have no idea how to make GUIs.

I don't know how to make a good GUI. That's why I need good templates and strong guidelines, discipline and spend long time on design. Most people don't do that.

TUI is much, much easier. It's also possible to do bad TUIs, but it's easier to do a good TUI than to do an average GUI.