Except that under capitalism, it will only ever be used to replace humans and benefit capitalists. It’s not that we want people working deliveries, it’s that these companies will roll out the robots with no plans or care for the people who are now jobless. The people who are now added to the unemployed labor pool and competing with every other laborer, driving down wages for everyone.
It would be one thing if we lived in a socialist society that actually cared about service to humanity, then we could treat AI as merely a tool. But in a capitalist world, this tool will have real negative impacts for millions of people.