Supermarkets crucially already have a customer support infrastructure and you can physically go to them to work out issues. If the burden is simply to have human customer support you can speak to then the burden is already fulfilled.

It is absurd that it is impossible to speak to a human at Google unless you have a loud enough platform. Amazon is similar too in many cases. As an Amazon seller the robot once decided that the price for an item on sale wasn’t correct. I told the robot it was in fact correct. The customer support person who I was able to reach after an incredible runaround told me through text only communication that the solution was to change the price either higher or lower. There was no way they could manually verify it. The robot had decided. In the end it took multiple guesses of adjusting the price to figure out what the Amazon robot would accept. This is beyond stupid.

that's surprising; every support interaction i've had with amazon has been incredibly positive, and i'm a nobody...

It's stupid for you. It costs Amazon only some difficult to measure lost opportunity that can't even be cited during performance reviews.

It is pretty stupid that the people who work at Amazon can’t even override the faceless algorithm that makes arbitrary decisions. I don’t care about the metrics. I care about common sense.

And yet there are regulations around health and safety that supermarkets must follow.

And yet, supermarkets close down quite often to make a political statement or when margins aren't sufficiently high enough. Kroger is fond of closing stores in areas threatening to raise wages.

That indicates that a local monopoly exists.