They flavor the tomato gravy awesome. Your missing out on real italian cooking.
I like the pig skin seasoned and rolled up tied and simmered in the sauce after sauté it in the oil and garlic in the sauce pan before we add the tomatoes.
I’m sure your in-laws eat it? In Europe nothing goes to waste when they butcher meats. My parents and grand parents ate everything even tounge. Everything was either homemade, homegrown, even fresh killed chicken.