Google is to blame, they're abusing device security by preloading their unremovable spyware with elevated privileges.. people then want to remove it but then find themselves unable to use banking apps because of this.
I'm not against having a separate secure phone to use with banking apps, but that phone must be designed for security, not for Google's ad driven business model..
Your words can be reasonably interpreted as "that phone must be an iPhone"; did you actually mean this?