I think you're both correct. For sysadmin definition of scripting, python would be most popular. For the 'fast to write' definition of scripting then sure, JavaScript.
For the second, the definition of 'scripting language' used to be 'doesn't use a compiler' but JS and everything else has a JIT now, so 'make something quick' is a modern equivalent.
To an extent...
If you're using something that supports promises and not callbacks, which not all of the things you want to use to write an actual script do.
Is it?
I'd imagine JavaScript usage/execution is probably way way higher.