I’ve never bought a jar of pasta sauce or pizza sauce, and it somehow perplexes people. It’s like 3 times the price of making it at home, and all I need to do to make it at home is open a can of crushed tomatoes and usually stir in some spices that dont even need to be measured. If I want to get really fancy, I might simmer some garlic and tomato paste in olive oil first, but still, it’s all just one saucepan with no measured ingredients, and it’s done before your pasta is done cooking, anyway.