There is so much information on nutrition out there on the internet and in books that those who have not gone to school for nutrition are starting to give advice to those around them on what they should be eating. Sure, there is the basic advice like eat more whole foods and vegetables that can be helpful. But, lets face it. We honestly don't know all the facets of what causes health in a human being.
I have had to break out of "giving too much advice" myself and learn to rely on my own client's gut intuition and body wisdom for what they know does and does not work for them. We hear stories every day of individuals living until they are 100 and they did nothing special in particular to live that long. We have studied centenarian cultures and the reasons they live so long are a mixture of components, nutrition only being a small piece.
Several people I've known in the health and nutrition world, who ate well, practiced yoga, and meditated got cancer and passed away. So the next time you read the latest health article, take it with a grain of salt. The very next day, month, year the same researchers may come out with another research contradicting everything they once said. Thus, there is no need to compare the way we eat to another human being. What causes health for one person may cause sickness for another.
So let's stop comparing, judging, and shaming others for what they choose to nourish themselves with. The only person who knows what is best for them is that person.