Adding more fuel to the fire is that most of the benefit in learning the underlying principles of software is being able to build, modify and introspect it. In a terminal, to view a text file, you could use cat. On a phone, you download an app. However, you can't pipe your Free TXT Viewer 2000 to another app (and if you could, it would probably inject ads). As the walled garden closes in, the incentives to learn diminish as being able to accomplish anything with such acquired knowledge will be severely limited.
Your phone has a different operational workflow than your command line. Yes you're not going to "pipe" it, but on my phone I can open an image in my Photos app, click 'share to' and share (open) it either into my Messages app, a file manager app, or an editor, which opens it just fine. Apps can absolutely share data between them. But not in the sense that an output buffer of the program is being injected into another. That really doesn't apply to GUI apps even on your desktop.
