I understand the hate. I created StrictYAML, which this tool uses, because of it (see the Norway problem - that was me). Type safety is paramount and regular YAML does not have any type safety.

I also understand the hate from the perspective of tools which misuse YAML - putting loops, variables, conditionals, etc. in like ansible or CI tools do, like your tool complains about. I hate that too and haven't done it. I was somewhat inspired by ansible in the beginning but Ive come to understand that it was the wrong approach for configuration management and that a turing complete language is a better approach (i.e. like your rust tool).

I dont want to throw the baby out with the bathwater though. The syntax is a very clean way of displaying hierarchical data, which high level stories need. Nothing else matches - Gherkin is awful at that.