I feel you. That's why we wrote a little library on top of SFN so that we can program SFN with Clojure instead of YAML https://github.com/Motiva-AI/stepwise. Application code sits with SFN definition and SFN Tasks are automatically integrated as polling Activities from Clojure code.

Thoughtworks made a case for this distinction in https://martinfowler.com/articles/cant-buy-integration.html#...