Well beef is heavily subsidized in most of the world as well. Protein is also not an issue on a vegan diet. I got like 5kg of Saitan (isolated wheat protein) for 10€. I cook with it regularly. It's higher in protein than meat and you can do delicious stuff with it.

I don't disagree that it's easier for most people to just keep the status quo, but it's definitely not impossible to change.