I wonder whose problems this solves.

I have a handful of scripts with miniscule CLI handling (usually len(sys.argv) is enough) - so it's 3 loc instead of 5?

Then I have a moderate amount of scripts where using click or optparse makes sense. Just looked up one tool, there's exactly 12 lines (including import, ignoring linebreaks) to handle 6 different CLI args. I could use fire. Less code, more "magic", less self-documenting excplicit code

Then there's this application with 15 @click.option() lines (don't ask, ran out of sensible single-char argument shorthands). Yes, it has an ugly main() with 15 keyword arguments, but I'd also have that with fire I guess. but here at least it's explicit again.

TLDR: Sounds absolutely nice on first skim, but I don't see why I would ever use this. Have I been writing so many CLI apps in python already that I exhibit stockholm syndrome towards click AND optparse? :)