How do you install the bank app if google does not allow you to install APKs manually / with a 3rd party store? You have to go with Google Play. Which requires a Google account. So I can't do it. That's the whole point of this thread: it would not be possible to use Android without a Google account.
When I was still rooting it was possible to bypass this on a rooted device with enough effort. It wasn't unsecure either. Padentic corporate security doesn't really make us more secure. Just more lazy.
Yes, that's the endgame, an Android device in a drawer at home. But what do I have to carry on my pocket to use the minimum amount of apps? Firefox, WhatsApp with video and audio calls, Telegram no video no audio, a mail client, a YouTube client (possibly not from YouTube), a maps and navigation app (for cars), phone calls, SMS.