Yeah in my opinion the overhead of the master program is tiny compared to the connection itself.
Sure the solution you are currently using might be “heavy” since it spools up a full UI.
And a single script multiple invokes of a simpler solution will be less. Since you only need the one command so you can get rid of streamerbots’ plugin system and command editing/etc
But I’d probably just use a script and feed the script different key/oAuth sets