I can think of some cases where it might make sense depending on the specific details. For example if you already had tons of scripts that you wanted to wrap a

I can think of some cases where it might make sense depending on the specific details. For example if you already had tons of scripts that you wanted to wrap and one couldn't install things as root this could be the quickest path forward. The nice thing about shell languages (like sh and to some extent bash) is they run everywhere with minimum dependancies. This makes them great for things like build environment configuration. Those scripts can easily get very complex and it's nice to have some built-in tools to help keep it under control.