Food waste in American homes is miniscule compared to the food waste in chain restaurants and fast food. You eating or not eating that steak is a mouse fart in a hurricane. There aren't enough mice to turn this train around. Food waste needs to be tackled in a very different way than demand. A vegan restaurant is just as likely to waste food as an omnivore restaurant is.

https://www.businessinsider.com/solving-food-waste-in-americas-restaurants-2016-5