The point of Linux on phones isn’t to have a phone that requires you to constantly fix it with CLI tools. The point is to have a free and open software platform for a device that is increasingly necessary for daily life.
As a side effect, developing Linux for phones would probably help us eliminate the need to reach for the terminal on desktop Linux as well. I believe snaps (which laid the groundwork for flatpaks) were originally developed for Linux on “smart” devices. The whole ecosystem improves when we try to bring Linux into a new domain.
P.S. I use termux (a terminal for android complete with its own tiny Linux environment) from time to time when I need to access my server over SSH. It’s a bit clumsy, but super handy!