Only about one-quarter of Indians eat beef, so it's not at all safe to assume that any random group of Indians you encounter will be majority beef-eaters.
Less than 1/10th percent Indians eat beef.
Person B: Sure
- goes to taco stand -
Person A: 3 tacos please
Person B: I'll take the enchiladas
Person A: Oh my god, we were supposed to be getting tacos for lunch. How could you do this to me?
No one's saying "assume they are vegans," we're saying "don't assume they eat meat." Big difference.
For real, any corporation employing a significant proportion of Indian people (hell, even non-Indian people too) should be culturally sensitive enough to know that any offer of a morale dinner must feature vegetarian options. This is basic cultural sensitivity and anyone who doesn't understand this has no business managing people.