I've been pretty aware of this ever since I became a cyclist. I will ride down to the corner store to pick up a six pack and some chips, throw them in a backpack and ride back. It's easy. I see people driving their cars to do the same thing. All that weight and space for a 6 bottles of beer. There is massive waste all around us.

A long time ago in San Antonio TX I was pulled over by the cops while biking back to my little apartment with a bunch of groceries. They were unwilling to believe that an adult would leave the car home to get groceries by bicycle.

(I'm from Italy originally).

There is also the time component. Off peak and with a decent sized backpack (change of clothes, laptop, food etc) it takes me the same time to go 6km as it does to drive it.

At peak it’s 1/4 to 1/3rd the time.

Cars are slow around town.

It's a reasonable solution, but let's not forget that simply walking is often at least as good a solution in many countries.

Getting a trailer (burley cargo in this case, but applies more generally) has been a game changer. I can even bike to ikea and bring back flat packed furniture with it. Or do the weekly groceries. The trailer can carry up to 100lbs iirc (I have an e-bike)

Short errands are much nicer with a bike: less effort than walking, much faster than walking, no parking headache at destination, cool breeze in your hair, and free (no gas, insurance, parking, tickets…)

Those people could be driving from 20 minutes away or on their way home from work, or running other errands or picking kids up from school or any number of things. Good for you though.