BB, I don't think you were wrong on thinking this "I would have sneered at the idea that there was a higher purpose than working insane hours in exchange for business-class tickets and luxury hotels and company-paid junkets to Budapest. " when you were 25.
When you were 25, you only had 25 years of life experience to judge what's best for you at the time.
Who knows, maybe when you are 60 reflecting back on what you are doing now, you will think differently on what you think is best, too.
I am shallow, I already know all the points you've listed in this post, but I have not eliminate any food from my diet (i.e. beef for envirnomental reasons) I am all for moderation - I think we need to eat a bit of everything to get the nutrients to be healthy. That being said, I am more cautious in terms of where the food is being produced or made, and what types of ingredients are added. The major reason that I've stopped eating certain food is taste! :) I am shallow.
You are describing my friend. She doesn't take days off because she thinks she is too busy for that. As if her company's operation will stop running if she takes a day off.