It's not arrogant, people absolutely cast off social norms all the time. That's how we drive change in our world already.
Remember segregation? We started out of that with people ignoring the rules (on both sides) despite the significant cost.
It's dead simple to stop eating meat from a social perspective, vegetarians are extremely common these days. To add to that, there's no social cost at all for simply reducing meat consumption. None of your friends are going to complain about you serving carbonara instead of steak when they come over.