Hammerspoon :  the best Mac software you've never heard of

I get it.. that is, the reasoning for Hammerspoon to exist as an alternative or extension to Automator/AppleScript. Who wouldn't prefer Lua over AppleScript? The best, that's a stretch.

As for the authors original use case.. all the overhead could simply be avoided by correctly setting up their network preferences in the first place!

Step 1. Prioritize your preferred Wi-Fi networks, either by Network Preferences>Advanced... or using: networksetup -addpreferredwirelessnetworkatindex via the command line.

Step 2. Select SushiNet and uncheck "Automatically join this network" via Network Preferences.