Ya ever question your battle with conventional wisdom when you see seemingly healthy people succeed on chronic cardio/vegan/vegetarian lifestyle?

I like the idea that I eat cleanly. But when a vegan or veg claims they eat clean because they DON'T eat meat, it makes me feel some what unclean. I then start to worry about all the meat I eat, and then fret over the meat I eat that isn't grassfed even though I try to get a much grassfed as possible. Anyone else ever worry sometimes from having CW ingrained into them for years?