Oh, you misunderstand. Involving a car would most definitely
not make it a better solution.
I have no interest whatsoever to involve cars in my life. Having to share the roads with them is bad enough. (The arrogance of space is ridiculous.)
Deliveries: these cost little because people aren't paid properly. If I wanted to pay them properly, I wouldn't be able to use their services much. So instead of normalizing exploitation in the name of convenience, I prefer not to use delivery services when it can be avoided. And with different supermarkets in almost every direction, within 10mins on foot they most definitely can be avoided. I don't mean to moralize, and I'll step right off this soap box, but keeping bad jobs alive is a disservice to my community.
More energy / more free time: neither the time nor the energy are wasted. If you want, you can see the time spent as an investment into health and focus, a tool for stress-reduction, an active period of mental rest, but really: this is not a zero sum game.
I don't think any of this will convince you, and I'm not trying to. But perhaps you can see that your view on the "best solution" is hardly universal and well-established alternatives exist that work for a surprisingly large number of people.