Well put, sir. I hadn't managed to put that into words quite as succinctly but you've pinpointed exactly my feelings and my reasons for skepticism.

Unless you bother to read up on the commands that it accepts you find yourself greeted 50% of the time with "I don't know how to do that". Now we're on the same turf as any good UX problem - power-users (who have the incentive to learn an interface) vs casual users (who don't and shouldn't have to). Chat bots seem to be targeting the latter but they require the time investment of the former.

I've grown very tired of all the differing UIS I must navigate on a daily basis.

I've never met a command line that wasn't obfuscated. Try learning Unix using only man pages as reference. With bots, you can at least expect reasonable responses to some natural-language requests.