Earlier quoted context omitted.
The Earth's population isn't getting any lower, those 10 jobs lost mean 10 people that will need support from the rest of society, just to survive. It's utopian to think job losses mean everybody gets their workload reduced, as this has never happened before. Automation has never reduced anybody's workloads. In fact, every reduction has happened to either eliminate de-facto slaves (industrial revolution) or because e…
They already need the support of the rest of society. No one survives on their own anymore. Automating a job like this gives more time and money back to people who buy groceries, which is almost everyone. Some of that can be used to support the lost jobs while they find something else to do.
Honestly, I think this is never going to actually be the case. Why would a grocery store lower prices just because their costs went down a bit? Neither the demand nor the supply has changed, nor has the price people are willing to pay for their groceries.
If nothing has changed but your costs, why lower the prices when you can simply report increased revenue to your shareholders? If competition comes along, a quick "we're premium, they are cheap" marketing campaign (or buying them out) would probably cost less than lowering the prices to match.