It's never safe to bank from a computer you can't control. I would always consider a phone to be compromised. These are the richest targets going for exploits so why risk it.
Although I agree with you, it turns out which banks and similar facilities you use can greatly affect the amount of credit you have access to, how you can use it, and how long the process takes.
During this pandemic I've found that to be a big deal, much more important than whatever technology or access method is offered.
