Is it? I use Android without Google account (with services though). No app forces account on me, there's always option to sign in through other platform or directly via email.
Do banking apps work normally if downloaded from the aurora store? I'd very much like to fully degoogle my next phone when I get to replacing it, and it's the last stumbling stone
I believe there are reasons this isn't a solution for everybody, but I just use the mobile website. Works for me, and probably a lot of people. I'd rather not have the app on my phone anyway.