YAML is like Regex in the "Now you have two problems" philosophy.

It's like using an XML file for what a txt file could do.

It demands frankly unnecessary structure and formatting just to be ingested, when it's all serially-read parameters, anyway.

YAML isn't the only way to implement parameterization. We could use our imaginations and think of a ton of tried-and-true ways to abstract it.

Have you ever done a quick-deploy on a cloud platform? The alternatives just generate all the esoteric stuff for you. Config files generated by guided steps.