Admin tools are not just time saved. They are also in itself documentation. If you just echo the one-liner you hammer into the terminal occasionaly into a shell script it could already provide worth just by being a file others (or the admin themselves) can see in the future. And this costs you nothing.

Bonus points if it is something complicated that needs to be repeated occasionally.

If it is something that needs half an hour reasearch and careful treading before getting the desired result and it costs you basically zero to save it in a script, just do it.