That's hardly a confirmation that it will never be possible ("for now"). It seems like a fair tradeoff for a launch when almost everyone has a smartphone and that's already enforced like that for many parts of life (I'm not saying it's great, but it's a valid tradeoff when alternative options exist) like banking or public transport where the happy path often is a phone app.
It's fine as long as we have alternatives, but if online shops were to start to phase out SEPA payments in favor of Wero and Wero-only shops were to start popping it, it would be a real problem.
Btw the solution already exists: It's still relatively small scale but GNU Taler is live in Switzerland. The EU could make regulation to make it easier to adopt at any time it wants.