I'd say the time spent looking it up (and maybe creating an alias/script) is less than typing it verbosely each time.

I don't see 'betty whats my ip address' as a valid alternative to 'ip addr list'. And in case of 'betty next song' vs. osascript -e 'tell application "iTunes" to skip to next track' I'd just alias the latter to something short & memorable (though I just wrote it from memory).