> But when an omni dieter looks unhealthy we just say “that guy looks rough” and when we see a vegan who looks unhealthy we say “vegan diets make you look rough”.

many such cases. People have no idea about how much their bias influences their perception of the world and then share the output of that worldview as if it is relevant to reality

Yep, and we can even see it in others. I have little doubt that if the person I replied to was a passenger in a car, the driver got cut off by someone and they responded by making a sweeping generalisation about people of that race/gender/religion driving poorly they’d be able to identify the same bias at play.

As I say, my thesis is that these double standards/logical contradictions are intellectual tools to protect us from our cognitive dissonance. We’re not really operating from a set of logically coherent principles for the most part.

I say this without judgement or any belief that I’m not doing the same thing in a million areas in my life. Just to point out that this is why I lean more towards cultivated meat than outreach activism when it comes to veganising the world!