It would be incredible if somebody invented a light car, that would transport one or two people and some groceries. Maybe with two wheels instead of four to take up less space. Hmmm why has nobody invented this?
There's also plenty of other, more practical / affordable microcars [1] on the road around where I live, they're considered equivalent to mopeds in terms of legality / requirements but you don't need a helmet, they seat two people and some groceries, etc. They used to be mainly popular for elderly people but they seem to catch on to other people too. Great for local traffic.
Honestly I don't know how she did it, but she did. It helped that we had separated bike lanes pretty much everywhere. It is entirely possible if the infrastructure supports it.
This sort of thing is why I'm personally a big fan of the 15-minute city concept.
Only bulk drinks (crates of beer/soda/...) are challenging. But for those, very often delivery systems are in place that surely are more efficient than individual trips anyways.
Whenever I go grocery shopping I mount a milk crate to my rear rack (this takes about six seconds) and put the cases in vertically. I can also carry a 4L jug of milk in the handlebar-mounted basket.
Usually we’d just stop on the way home from work or whatever to do small, quick shops for whatever we needed.
But on the rare occasion where we did need to do a “big shop”, we just ordered groceries online for delivery the next day. All the major UK supermarkets offer this, with free or very cheap delivery, delivered by environmentally-friendly electric trucks.
There are billions of people that manage their shopping without a car. Millions of them live in North America. Surely, some of them have solved this problem for a family without having to go shopping daily.
So what if I own and use a small family car, to go shopping and take the kids places?
Let's not let the perfect be the enemy of the good.
My neighborhood is a real life 15min city, and most people of all ages choose to walk. We don't need to prevent families from owning a car and taking it grocery shopping once a week.