Earlier quoted context omitted.
Financial privacy is not a human right. Moreover the kind of financial privacy you think of is from other citizens to not know your financial movements, it doesn't apply to nation states for obvious tax reasons and money laundering purposes.
Financial privacy is definitely a right. The question is whether that right is respected by any given institution. Since it is against the interests of existing institutions to do so, they will not unless compelled by a greater force. Cryptography allows individuals to use the force of mathematical law, superior to all other law, to enforce their privacy rights . (Tornado cash, like most mixers, leaves too many looph…
This is a baseless, so I think you're making a bad assumption. Finance is opaque at a low level because of arbitrage and physical trade, but it's the belief that the physical world dictates social rights (which are moral at the core, so let me know if you want to jump to morality?) is simply incorrect.
What's more, I think that the default position that finance should be private actively hurts society in innumerable ways. Unfortunately, without it, capitalism immediately breaks down into monopolies. So we live in the happy middle, as with many things, suffering the inevitable (corruption, blackmail, etc).