that's just not true. NATS does have neither at-least-once nor exactly-once. NATS Jetstream has at-least-once, but it does not have flexible topics anymore like NATS. It's two completely different things.
well that's one way to see it.
however, in germany, we don't want to have homeless and extremely poor people, so we solve it by taking money away from the rich and middle class. for some people it might be called communism, for germans and in general europeans however that's just the baseline they expect from a functioning state.