People are trading the future of personal computing just so they can run a banking app and justify it with "but I want my phone to be locked down for security." Not even sleepwalking into corporate-controlled-computing, but actively promoting it.
10, 15 years from now the ability to run your own code will be a distant memory unless you constantly subscribe to an annual Developer Account with BigCorp. Oh no, you've coded something that violates the ToS; account terminated.
Such a wild take to me. I install an entirely different operating system on my phone (graphene) which also advises me not to root because it's stupidly unsafe to do so. I also don't log in as root on linux, nor do I log in as an administrator in windows. None of these are sane practices to anyone worried about security.
I have plenty of devices like raspberry pi’s and handheld Linux gaming devices that allow free unlimited access. My phone is the one thing I want fully secured because it’s where all my most important data and keys are.