So are some aren't. I can buy a voice over on fiverr, I can send them a script and a few notes and get back an MP3 within 24 hours. Over the next 50 years these people are at risk of loosing their jobs to computer synthesised voices.

If all Starbucks outlets look the same, sell the same stuff and use the same process, I'd say the manager is largely just following the manual.

As for taxes, mine are already prepared by a computer then just checked over by a human. That's not to say there aren't also high end accountants designing company structures and doing financial planning.

When I think of an accountant, I'm thinking of the kinds of ones that do company structuring.

And, congratulations, you can find people who are willing to do voice over work quickly. That doesn't mean it doesn't take a lot of creative work to get the right feel and urgency for the situation. Improvisers sometimes use scripts, too, as a stage gag, and they'll read the things they're using too, but it's them that adds personality, intensity, everything.

And managers, they manage /peeople/. Maintaining a store's stock isn't too bad. Managing people and solving disputes in a pleasing way for all involved, that's a much harder problem.