Except that now when you do need a tool like XSLT/XPath, jq, or yq, now you need bash. I use bash lots, but still I'd rather use a better language, like the ones you listed.

I'm being slightly hypocritical because I've made plenty of use of the filesystem as a configuration store. In code it's quite easy to stat one path relative to a directory, or open it and read it, so it's very tempting.