I think I can understand where your heart is, but there are just way too many ways that this would be more of a hindrance to society than it would be of benefit.
If I get a tapeworm and the government tells me I can't get treatment, I'd have to think long and hard to keep myself from contaminating some major food sources.
That's why I said not considering actual consequences, because I'm not sure what'd be the right thing to do on cases like that
And I also know that if people stopped consuming meat, dairy and other derivatives overnight there would be a huge impact on the environment... So, yeah. But in a utopian world that'd be nice.
And Boggart, I don't consider petting animals speciesism as long as you don't treat the animal as an inferior being.