Yea but rendering a book’s worth of that, with text selection and embedded web content, is not trivial with the native UI frameworks like it is with web UI.
You can also link directly to a web installer so customers don’t even have to ever see the Store app. The Store provides you a web link for a tiny exe installer, like this:
https://developers.openai.com/codex/app/windows
Because it doesn’t matter. The biggest AI apps of last year were command line interfaces for cripes sake. Functionality and rapid iteration is more important.