People think that they're entitled to eat "whatever" they want, after all, "it's legal" and "everybody does it". When we present veganism as a diet instead of a struggle against all injustices committed against animals we strip veganism of its moral imperative and the animals suffer the consequences of it.
Let's not soften the message. Anything less than the abolition of all animal use and exploitation and the rejection of the notion that other animals are here for the human animal slows down the road to animal liberation.