You're not wrong, and I predominately use a TUI at work where I'm actually at the computer for ~8 hours a day.

But I use OpenCode / OpenChamber for personal stuff where I might only get 20 minutes at my computer before I have to go do something else. So the web interface and especially the mobile app get more use from me there. It's kind of wild to be working on a project while walking my dog or washing dishes or something along those lines.

I also used the desktop OpenChamber app once recently because it has a built-in web browser that the agent can fully control (unlike, for example, Gemini in Chrome).