A non meat dish is still going to taste like a non-meat dish. Perhaps your colleagues were just being polite and avoiding treading into politically charged territory after you brought up the Amazon.
Personally I'm a picky eater and vegan/vegetarian dishes simply do not compare to meat. I'm sure others feel similarly. Though for one meal I suppose it isn't a huge deal - but acting like it's just as good simply isn't true for the majority of people - that's your personal taste.