Everyone is responsible for their actions. And every trade has two sides. 

If I was hooked on heroin as a kid, I would blame my parents more than the dealer. I have even less strict attitude towards food companies. 

They are offering and I am choosing, I am very picky and I am at the driver's seat of my life. 

I don't know about other people, maybe they are happy the way there are. If not, it's only them who can change their lives, not even their friends and definitely not the companies.