I grew up with a mom who canned produce from her garden..her mom did the same. I did the same.
I live in N.CA now..and was invited over to my neighbors garden to pick as many tomatoes and lemon cukes as I wanted. I told her I would can some and bring them back. She said she'd never done that..nor had her mom. My mother-in-law said the same.
Is is just a thing that people do who happen to live in areas with shorter growing seasons?
I'll never forget the time my mom and dad drove to CA (from Wyo) to visit my step-sis. I was still living in Wyo. My mom called me all excited..."we were driving down the freeway and there was this huge open truck filled so high with tomatoes that they were falling onto the highway. I made Jack stop so I could pick them up along the side of the road. I couldn't believe it that nobody else was stopping. All those tomatoes going to waste!"
She had enough to can 40 jars by the time she got to S. CA...even tho she had to buy all of the canning equipment when she got there. She left some with my sis and brought the rest home. I have never seen her so happy or so smug.