It’s also really hard for most people to think of what to cook at the end of a long day. Meatballs and potatoes is the first thing that pops to my head and turning that into brussel sprouts and potatoes sounds unappetizing but impossible meatballs and potatoes is quite close especially if I add a sauce. I guess that’s the cultural imprint.
I do also care about the animals and the environmental impact and it’s just extremely naive to think that a large part of humanity would switch from meat-based diets to tofu and steamed veggies. People are lazy and like tasty easy things.