What is KYC?
KYC (know your customer) is the identity check a service makes you pass before it will do business with you. In practice that means handing over your legal name, a photo of an identity document, and sometimes proof of where you live. Banks do it. Card networks and most payment processors do it. It exists largely because regulators require regulated financial services to know who their customers are.
Once you have passed it, your activity through that service is tied to a verified real identity, and the service holds the keys: it can freeze an account, reverse a payment, or refuse you outright.
Why does no-KYC matter for sovereign setups?
The whole point of self-hosting is to depend on as few third parties as possible. A KYC gate quietly reintroduces one: a company that knows who you are and can pull the plug. For a project that wants to accept payment without asking every visitor to prove their identity, that is the opposite of the goal.
So sovereign setups tend to reach for payment paths that need no identity verification, often self-custodied and self-hosted, where settlement is final and nobody is holding a switch they can flip. The trade is real: you take on the responsibility a bank would otherwise carry. That is the bargain, and choosing it on purpose is the point.