In our Delhi office, each elevator has an attendant who's sole job is to push the button of the floor you want. This means less space in the lift for passengers, and lifts being taken out of commission because there's nobody to push the button.
Removing this job (by having the technology to allow passengers to select their floor themselves) means improvement for the users.
The same applies to shop checkouts - I'd far rather go through an automated checkout rather than deal with a person at a till, faster and less distracting from what I'm doing. Same thing with buying things from amazon rather than going to a legacy shop, watching a movie on Netflix rather than renting a video from blockbuster, or returning library books to a computer rather than a person.
The problem comes when those who lose the jobs lose out - the guy who's job is to push a button I can easilly push myself, or the taxi driver who's job vanishes when the computer does the driving instead. We deal with those issues by education (so people can do better jobs that aren't automated), and social safety nets.
If a robot can do your job, it's a terrible job. You may need it with our current economic system, But that isn't a good thing.