I’m not sure how recently the argparse docs were audited by the editorial board, but I did work on a somewhat major refactoring a couple of months ago (GH-124478: Cleanup argparse documentation by savannahostrowski · Pull Request #124877 · python/cpython · GitHub) to help deduplicate content and clean things up.
I’ll check out the Docs Discord, but I’m happy to help support and collaborate on additional refactorings on both the argparse docs and tutorial, as I agree, there’s still a lot of improvement to be done.