Before I get into that, I want to explain why I eat what I eat, so that people considering changes based on my opinion can make sure that my goals align with theirs. I choose what I eat for long term health and longevity. That's it. I love animals and think they should be treated kindly, but if factory farmed meat would make me healthier, I would eat it. Taste is important within the range of healthy foods, but if styrofoam packing peanuts were the secret to health, I'd be pounding them down. I don't eat to gain association with any group or subculture. Whether I'm considered vegan, vegetarian, paleo, carnivore, or anything else doesn't matter to me.
I'm not trying to be right yesterday, I'm trying to be right today. Sometimes that means admitting that I was wrong and making the best change I can. I base my identity around adapting quickly to the best information I can find, not clinging to the previous best information.
Also, I don't care how much money I spend on healthy food. If $5 buys me a meal that's somewhat healthy and $10 buys me a meal that is completely healthy, I will pay the $10. The act of eating is amongst the most intimate processes we undergo. The food we choose alters our bodies, minds, and futures. That makes it a top priority financially and otherwise. I once read an exchange where someone asked someone else why healthy food was so expensive. Because it's more valuable, he replied.
I'm sitting outside the Viking Museum in Oslo Norway. The museum is closed, but the little ice cream stand in the otherwise empty parking lot is still open. I'm on my third ice cream.
Eating ice cream in Norway is about as nonsensical as it gets. The ice creams are the crappy kind you find in freezer chests at truck stops. Norway is the most expensive country on the Big Mac index (and easily the most expensive country I've ever visited), so each ice cream costs around $4 US. It's not really warm here. Oh-- and I don't usually eat ice cream.
When I travel in new countries for short periods of time, say under a week, I allow myself to eat anything and everything. I do poorly with grey areas, so my diet is either 100% on or 100% off (although some things, like soda and margarine, are so offensive that I never eat them). It's usually 100% on, but I recognize that with two or three days in a country, my time may not be best spent scouting around for a decently healthy restaurant. Also, I'm pragmatic enough to know that a few days of eating crap food probably won't affect my long term health.