But vegans are against eating canned pre-cooked food as well. Doesn't matter that the "meat" is 1% actual dead animal and 99% cardboard or if the noodles are 99% the stuff that got stuck to the wheat mill during flour production and 1% egg. Those folks will not eat it.
Vegans aren't against precooked, that is the macrobiotic types tjat only eat raw food and use a low speed blender to not add heat and destroy nutrients