You're missing the forest for the trees. My point was that you're losing flexibility when you're not able to parse/generate a data-driven file using a well-know

You're missing the forest for the trees. My point was that you're losing flexibility when you're not able to parse/generate a data-driven file using a well-known data format. And unless you're using a homoiconic format, code is not (easily) parsable as data.