It’s a bit sad though that social life seems to be all about carby food for many. I try to eat low-carb since ages (well it’s not hard so I am usually successful and when I am not, it’s my choice) and I had meals with families or the other choir members where I simply avoided a big part of the options (all of them when there was a cake shop involved. I had mineral water) and no one batted an eye. It was about company, talking, not the food. Food is important but if one chooses to ignore it, I don’t feel it impacts the talk so much. Maybe I am super lucky. And I admit I never had to say no to a Grandma with a tray of baked goods, I suppose that is hardcore level (the nightmare level is when adorable kids give food to their parent).
Health… Yeah because how people eat and drink in company is healthy enough but an informed keto ruins our health 
Sure.
I agree but try to tell that some vegans… Once one acted like I have insulted its religion. Maybe I did. (It was a double sin as I ate corpses a few times a year, not just avoided the sacred grains but they seemed to have a huge problem with the latter. They didn’t even know me!) And I don’t have a problem with vegans in general, most of the ones I have met never had a problem with me either (though I didn’t make it my mission to tell them the finer points of my actual diet), it’s just the loud opinionated ones who had to tell me how horrible I am when I commented on a vegetarian paleo experiment article… Paleo. Not vegan. Not even every vegans eat grains so I suppose such vegans are against other vegans too. Just like such thing happens among ketoers too, just not so much on this forum. People tend to be pretty tolerant here. About personal differences and tastes, I mean, not about BS 
Feel free to be intolerant about stupid, dangerous beliefs, I say. Tastefully enough, of course.