How else would you buy a used car/motorbike from a private party?
I don't know about your experience, but I'd like to limit the amount of PII I give to the type of folks I buy used vehicles from. With cash, you both go on your way with the title. Its not to say they were criminals, but I also don't have much reason to trust them beyond the transaction.
For example, I was helping a friend buy a motorcycle. The seller arrived on the bike, we checked it out, paid, etc. He had a shirt on that said something like "stop domestic abuse". Then when his wife/gf/partner showed up to pick him up, he immediately started throwing verbal abuse at her. The guy was unstable but it wasn't immediately obvious. We already had the bike, the title, and we were on our way.
By the way, you're still allowed to use cash for private transactions, so you can still pay whatever amount of cash you want to a private party to buy an item.
[0] https://en.wikipedia.org/wiki/International_Bank_Account_Num...
The online payment system via bank transfers (iDeal) works so well I’ve heard it’s going to become a european thing, and I’m legit excited about that.
And let's not start with some fetish fantasy about "because an oppressive regime could do so any time"
The car is a variable for anything you can think of, but I will give you a hypothetical example with the car then. Imagine in 20 years where owning a gas car is frowned upon, the government introduces a new law that one can no longer purchase gas cars - used or not, maybe this government was even lobbied by some electric car conglomerate. Am I allowed to worry about that or is that a fetish fantasy too?
The bank, at its discretion or under order by government, can and will prevent the transfer of funds, so it's really just a case of Murphy's law.
I don't know why there has to be appeal to "fetish fantasies". Is it so hard for you to imagine a scenario where you or others might unjustly be the target of nefarious actions by public or private parties who would wield the bureaucracy of banking system against you? This isn't a hypothetical, one of things opposing counsel does in a lawsuit involving money is to attempt to freeze or restrict your accounts.
You may have never been in a situation where a bank prevents you from moving money, but it happens, and the worldview you are espousing doesn't survive first contact with such a situation.
But you don't have to take my word for it. There's a reason the market for gold ingots exists, and it isn't just to guard against inflation.
You trust some entity you have never personally audited, to produce some pieces of paper that you are supposed to trust...