It's strawberry season in the south. There's a farm just outside of town with a big U-Pik-Em sign on the road. This year it's They-Pik-Em although I can't imagine there's any actual risk being out solo in a row of strawberry plants with a wooden basket. Whatever. I bought a flat, about 8 pints of berries. I used about 2/3s of them to make jam.
The pot on the left is heating, that's the first batch. The berries on the right are measured out and waiting. It's labor intensive and time consuming. You have to have the jars and lids boiling, the mix boiling, and put it all together hot.
I do it once a year.
I can imagine doing this through the summer and into the fall, as crops ripen, putting up corn, beans, pickles, peas, and fruit. Every jar representing the labor from planting to harvest. Put up in the cellar for meals anticipated and hoping you had enough to take the family through until the next harvest. It would be a very different experience from putting cans in a shopping cart off a list.
The past, as Borepatch quoted, is a different place. People lived at a different pace.