Oh, I'm not wringing my hands about every food decision I make, but I'm very aware of what I put in my body. I'm human, and certainly far from perfect. I do eat processed foods from time to time, but my body doesn't work as well when I do. I have less energy, poor digestion, and several other symptoms.
I got the genetic whammy of diabetes, high blood pressure, and high cholesterol. If being an educated consumer prior to injesting food makes me a "selfish SOB", so be it. I see it differently.
I have watched my father lose all of the toes on his foot (in 3 separate surgeries), have 2 strokes, 5 cardiac bypasses, two heart attacks, and stents placed. He is turning 59 in November. He has been dealing with the same genetic whammy for 25 years. All of the information was out there and he chose to ignore it. To me, that is far more selfish.
I choose a vegetarian diet because I (selfishly) want to be in better health in my 50s. I want to be there for my kids and grandkids. Additionally, I don't really care for meat, and just don't believe it adds any form of satisfation to my life. I enjoying living in peace with the world around me, and I don't think animals should be killed to nourish me. I do what I can in a lot of areas, but I don't harbor the belief that I can control anyone but myself.
No need to feel sorry for my selfish self.