It must be said that this coding style may be the norm with Quarkus (and with Spring which it is trying to replace on graalvm/native-image), but isn't required by Java itself. As always, Spring-like Java buerocrats have chosen to chase and over-engineer trivialities because it's so much easier lol; well until using your framework becomes a study in psychology or software archeology.

Update: what I don't get with Quarkus though is why did they set out in Spring factory style only to have to immediately limit this for native-image's "closed world assumption"