I have emphasized the main difference between this and a bank multiple times, but if it's not sufficiently clear: A bank holds your money. It can do whatever it wants or is forced to with that money, including seizing it if you're Canadian and attend a protest[1]. In the system I outlined, a bank can only decide whether a transaction you dispute should be reversed. As long as you don't dispute any transactions, the bank has no ability to take your money.

[1] https://www.newsweek.com/banks-have-begun-freezing-accounts-...