> don't bring any additional benefit to just writing code in your normal programming language to do the same thing.
In some cases advantage is that you don't create new code and you just use some relatively standard tool. You just fetch some public package that handles various edge cases and you just prepare script that describes what you want to do with some program. This is useful, if you work in containerized environment and configuration exists as json or yaml. Often I just use jq or yq, instead of reinventing wheel to just read or write some values.
In some cases advantage is that you don't create new code and you just use some relatively standard tool. You just fetch some public package that handles various edge cases and you just prepare script that describes what you want to do with some program. This is useful, if you work in containerized environment and configuration exists as json or yaml. Often I just use jq or yq, instead of reinventing wheel to just read or write some values.