Saying 'eating animals is yummy' as a justification for killing them is pretty much the same argument as saying rape is OK since it feels good to the rapist. Civilized people require more than sensory pleasure to justify behaviors.
Oh, FFS. We have reliable, scientific data that shows that plants can tell when they're being eaten. This life of ours is a macabre carnival in which we attempt transmute death and pain and blood and shit into something worth the price.