> that's cash

Exactly! I want digital cash. We have the technology to do that, so why not? The tech crowd hyped up Bitcoin, but why never privacy coins? Any single flaw becomes killer, even if the flaw is unrelated to privacy or even petty. Hell, I'd even take a US ZKP-based stable coin that was pre-mined (but had strong privacy guarantees) and had even a small (like 0.1-0.5%) gas fee that ended up acting as some form of consumption tax. At least then there's some guarantee of tax revenue while maintaining the notion that Big Brother doesn't need to know I gave my friend some beer money.

Our world worked with cash before. Sure, it wasn't perfect, but are those imperfections worse than the mass invasion of our privacy? There's no perfect system, so the only question is how we weight certain issues, not that flaws exist. If we purity test then the only winners are the immoral people who are willing to lie and deceive so that their choice appears to pass said purity tests. They love us to spend our time infighting because that's less time working against them.