I think the main reason people prefer TUI are certain assumptions that come with it. Like I assume a TUI runs on vim like shortcuts, allowing me to move with hjkl. It isn't the case everywhere, but it's what I have observed mostly.

When a software is created for the terminal, it can expect the users to know these certain shortcuts. But this cannot be assured for GUI.

Most TUIs give you keyboard but mouse is a second class citizen, most GUIs give you mouse but keyboard is a second class citizen. To that extent, I’ll take the mouse only any day. I really want to learn over time the 5-15 shortcuts that speed up my day, not be forced to learn all of them day 0. And I say this as a power user, a casual user will use 2-3 shortcuts per app at most.

Nano always shows most important (all?) hotkeys on the screen. (works really well for its usecase)

It ain't dependency free, if you need pen and paper.

It was fun to put 192.168.1.1 in there. https://deathbyclawd.com/?url=192.168.1.1

This is so simple to use and to be hacked. Very much insecure, as I can post a journal on anyones account. I have access to everyones account theoretically.