It's built on the excellent SEPA system, which standardized bank transfers and "Lastschrift" in Europe. SEPA itself got a huge upgrade last year with mandatory instant transfers that cannot cost more than standard transfers between European checking accounts.
Both of those allowed Wero to happen as a final abstract top layer, meaning: the UX of sending money to an email address with the security and convenience of bank transfers. And everything is built collaboratively on top of European banking infrastructure.
No account necessary and no private american conglomerates can delete that account.
And before some says: "Well, now the government controls everything!": They already did, since... Ever. Now its one less entity with that access and one that can be (hopefully) controlled and changed by a majority.