Eating plants is also bad, they are Alive and feel pain. However the people that don't recognize that eating animals (we are animals) is significantly more immoral are willfully ignorant. There will be a time when we have direct nutrient materialization into our system, or when we can produce what we eat right before we eat it, like 3d printing, so nothing will be harvested from the earth and no life will be taken.
Nonetheless, in current human conditions, 95% of people can be just as healthy and spend the same amount of money to be vegetarian. Being vegan is very honorable, but not everyone can afford not getting some protein from dairy - I do think eating eggs should be minimized as much as possible, given the horrid industry that kills male chicks by the millions because they don't lay eggs. Our system is hideous, and the karma is catching up - it will be a horrible wave of suffering. The only thing that can mediate it is Disclosure.