Just having extra outlets though would not help with that much if more than 1 or 2 appliances were drawing that much load and did not have their own breaker. The standard 15-20 amp breaker powering all or most of the copious outlets can still be overdrawn if the occupant plugs in too much kitchen stuff. It is my understanding that usually the refrigerator has its own breaker, but the rest of the appliances are on a common circuit.

Edit to add - just checked my breaker box. It looks like the disposal and the dish washer each have a 20 amp breaker and the rest of the kitchen is on a 3rd 20 amp breaker, presumably along with the refrigerator. It's an old house though, CA code is probably pretty strict on the breakers.

Having multiple outlets on the same breaker is fine as the house wiring will work fine with the trip current of the breaker, and it even might get inspected during installation to make sure it was sized correctly (this varies highly by location and the amount of change/new construction).

The cheap non-fused extension cord someone is using for both their microwave and toaster oven typically cannot safely handle the over current until the breaker trips like the house wiring can.

These 18" receptacles are not on one, or two circuits, wired in parallel. Now, if every receptacle was required to be isolated, your explanation would make sense.

Use to be a union 6 member. The code might now call for every receptacle to have it's own circuit breaker. It wouldn't surprise me.