I agree so much with this. Vegans are right, period. It doesn't matter whether they mind their own business or are annoying about it. It doesn't matter whether they are preachy because they preach the obviously right thing. They are right.
I'm also not a vegan and I know that I am a hypocrite every time I eat meat or have milk. I would never defend my non-vegan choices. There is absolutely no good reason for me to have steak or milk or eggs. Not in this place and time when alternatives are available everywhere.