Unpopular opinion: My local farmer's market in Boise ruined my sauerkraut for good.
I watched a vendor there just pack cabbage and salt into a jar with her bare hands, no sanitizer, no starter culture, and after tasting her perfect kraut three weeks later, I realized I'd been overthinking the whole sterile process for years.
My third batch of kraut I made in a mixing bowl on the floor of my apartment. I just washed my hands, shredded a head of cabbage, and rubbed in a handful of salt until it felt wet. Stuffed it in an old pickle jar with the lid loose. That was the best one I ever made, no fancy airlock or anything. I realized the good bacteria on the cabbage want to win, they just need salt and to be left alone. All my clean gear was probably holding me back.
Totally get the "overthinking the whole sterile process" thing. I mean, I used to bleach everything and weigh the salt to the gram. Then my neighbor, who just mashes stuff in a crock with his hands, gave me some and it blew my mind. It was way better than mine ever was.
My first batch of sauerkraut took me three hours because I was so scared of germs. I had the whole kitchen looking like a lab. Sometimes I wonder if all that stress gets into the food. Your story about your neighbor is a real eye opener. It makes me want to try a more relaxed method next time.