99.999% of people don’t root and install custom operating systems on consumer hardware. The bank derives immense security value by enforcing this, at the expense of your hobby installation.
While i agree it is uncommon - i disagree that banks get much security value from this. Most banks let you do etransfers from a desktop computer just normally. I dont really see what attacks banning rooted phones stop when you can just use your normal linux desktop.
Yeah what did you need that freedom for anyway?
I don't think this is as unusual are you're implying it might be.
I've moved funds ranging from 10k to $1m between banks in Canada much more than once, and every single time, I go to one and get a draft and drive that draft over to the destination bank. It's just easier...and its absurd.