Wero is a trap at best or more likely a figleaf that is meant to fail.

EU private banks much prefer the status quo over systems like the Brazilian PIX taking over the digital payment systems.

So when the EU central bank started looking into a sovereign alternative to Visa/Mastercard etc. the private banks scrambled to put together Wero to delay and maybe prevent the central bank from coming up with a system like PIX.

Sadly GNU Taler was never really an option for these banks, as it is an open standard and thus even if they supported it, the central bank could still plug into it with their own system and thus they would be forced to compete with that.