If there's a live person announcing station stops that person is drawing a bi-weekly or monthly paycheck - at union rates.
If there's a recording that's keyed by touching a button, the company paid for it once. The person touching the button might be a throat cancer survivor who CAN'T speak clearly, or someone with a heavy accent. It's certain that the person in question is actually there to do something else, like drive the bus or collect fares on the train.
I remember, back when Ma Bell was a monopoly, all of those, "Out of service," and, "The number you are calling..." announcements were recorded by one woman with clear diction and an annoying nasal overtone. No matter where you were in the United States, you always got the same voice.
And then there's the old story about the train arriving at a town called Euralia. At one end of the coach, the brakeman announced, "You're-a-liar." At the other, the conductor sounded off with, "You really are." (I've often wondered what the correct pronunciation was...)
Chuck