I'm basing my claim on the approximately 100% of food based ads I see not being for plant-based foods, and typically emphasizing how "meaty" or "cheesey" their product is, and the similar proportion of product placement in tv shows.

I've never seen a food related billboard that was for a plant-based product. The only ones I can think of are for steak, burgers, breakfast foods like sausage/bacon/eggs/pancakes/etc., or cheese curds for some reason.

I can see your point on the food pyramid changes, but the food pyramid is also still recommending meat and dairy consumption for everyone. That's definitionally not a vegan diet recommendation.

I'm not sure what your point is about the conflicts of interest. A bunch of those are exactly what I said: pork, egg, dairy, etc. Also, when you recognize that almost all grains and soybeans go into animal feed, you have to include those as part of the animal production industry too, because they're just an intermediate input producer.