Besides McDonald's using shit ingredients, I disagree with your entire statement. Junk food is food that lacks nutritional value and is high in calories; making nachos at home doesn't make them clean food. If you make pizza tacos at home, they'll still be junk food too.

It's ok to have some junk food sometimes, but if pizza tacos are a daily thing for someone I'm gonna assume they're from a poop knife kinda family.