I take it you didn't bother to read the words commute and job, which implies travel to a workplace to conduct work. While you can combine a commute with a trip to buy groceries, if it happens to be on the way, and drop off/pick up kids at school, if it is on the way and the schedule works out that way, for most that's simply not reality. Note that my post said nothing about giving up one's vehicles, it only mentioned commuting trips for work. Don't add things to comments that aren't there.

taking kids to school is actually the reason we just caved and bought a cargo bike, which we're gonna add e-assist to.

For a great many people in urban centres, the school run is the most egregiously frustrating car journey and the one most attractive to eliminate

The groceries can be delivered by car or van efficiently, as the same delivery person can also serve other people along the way (as opposed to everybody going to get their groceries with their car indepedently and polluting 10x).

Or you know, have supermarkets and grocery stores in walking distance.

As for the kids, there is such a thing as a school bus...