The meat industry receives billions of dollars per year in the US from the government, so I don't think you can make the case that we're steeped in anything other than a pro-meat agenda that's so ubiquitous that you can't even film the inside of an animal feed lot. You're just serving your children the status quo indoctrination and patting yourself on the back.
Maybe you can show them the data: https://ourworldindata.org/land-use-diets
You keep bringing up how tasty meat is, but I don't see how that interacts with the concerns here since we don't use pleasure as a blank check to permit anything we might want to do in the world. It also might be a cooking skill issue on your part. I recommend this book: https://rainbowplantlife.com/cookbook/ and her Youtube channel. I eat her tofu scramble daily.